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Volume 26; 2014
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Case Report
A case of chronic myeloid leukemia in a diagnostic radiographer
Chulyong Park, Sungyeul Choi, Dohyung Kim, Jaechan Park, Saerom Lee
Ann Occup Environ Med 2014;26:54.   Published online November 28, 2014
DOI: https://doi.org/10.1186/s40557-014-0054-8
AbstractAbstract PDF
<bold>Background</bold>

Occupational radiation exposure causes certain types of cancer, specifically hematopoietic diseases like leukemia. In Korea, radiation exposure is monitored and recorded by law, and guidelines for compensation of radiation-related diseases were implemented in 2001. However, thus far, no occupation-related disease was approved for compensation under these guidelines. Here, we report the first case of radiation-related disease approved by the compensation committee of the Korea Workers’ Compensation and Welfare Service, based on the probability of causation.

<bold>Case presentation</bold>

A 45-year-old man complained of chronic fatigue and myalgia for several days. He was diagnosed with chronic myeloid leukemia. The patient was a diagnostic radiographer at a diagnostic radiation department and was exposed to ionizing radiation for 21 years before chronic myeloid leukemia was diagnosed. His job involved taking simple radiographs, computed tomography scans, and measuring bone marrow density.

<bold>Conclusion</bold>

To our knowledge, this is the first approved case report using quantitative assessment of radiation. More approved cases are expected based on objective radiation exposure data and the probability of causation. We need to find a resolution to the ongoing demands for appropriate compensation and improvements to the environment at radiation workplaces.


Citations

Citations to this article as recorded by  
  • Does occupational ionizing radiation exposure in healthcare workers affect their hematological parameters?
    Nejdiye Güngördü, Seher Kurtul, Ayşenur Özdil, Mehmet Sarper Erdoğan
    Archives of Environmental & Occupational Health.2023; 78(2): 80.     CrossRef
  • Effects of exposure to low-dose ionizing radiation on changing platelets: a prospective cohort study
    Ning Liu, Yang Peng, Xinguang Zhong, Zheng Ma, Suiping He, Ying Li, Wencui Zhang, Zijun Gong, Zhenjiang Yao
    Environmental Health and Preventive Medicine.2021;[Epub]     CrossRef
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Research Article
The association between long working hours and the metabolic syndrome: evidences from the 5th Korean National Health and Nutrition Examination Survey of 2010 and 2012
Jae Uk Jeong, Man Joong Jeon, Joon Sakong
Ann Occup Environ Med 2014;26:53.   Published online December 21, 2014
DOI: https://doi.org/10.1186/s40557-014-0053-9
AbstractAbstract PDF
Objectives

This study was conducted in order to evaluate the association between the working hours of Korean employees and the metabolic syndrome and the effects of long working hours on metabolic syndrome based on the 5th Korean National Health and Nutrition Examination Survey (2010-2012).

Methods

Based on the 5th Korean National Health and Nutrition Examination Survey (2010-2012), 4,456 Korean employees without shift work, aged over 15, who work 30 hours or more per week were targeted in this study. The association between the general characteristics, including age, smoking, alcohol drinking, exercise, and the metabolic syndrome criteria defined by International Diabetes Federation (IDF) and weekly working hours were analyzed. In addition, the association between weekly working hours and the metabolic syndrome of the subjects stratified by gender was analyzed through multiple logistic regression analyses and generalized linear mixed model after adjusting the general characteristics.

Results

In the results of stratified analysis by gender, in male subjects, in comparison with the 30-39 weekly working hours group, there were no significant adjusted odds ratios to the other working hours groups. In female subjects, in comparison with the 30-39 weekly working hours group, there were no significant adjusted odds ratios to the other working hours groups. In addition, no trend associations were observed among weekly working hour groups in both stratified genders.

Conclusion

No significant differences in prevalence of metabolic syndrome of the subjects stratified by gender were found according to weekly increasing working hours. However, due to some limitations of this study, further prospective studies may be necessary for verification.


Citations

Citations to this article as recorded by  
  • Long Working Hours and Dyslipidemia: A Systematic Review and Meta-analysis
    Chan Young Lee, Seung Yeon Jeon, Joonho Ahn, Ji-Hun Song, Mo-Yeol Kang
    Safety and Health at Work.2025; 16(3): 268.     CrossRef
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    Hye-Eun Lee, Ichiro Kawachi
    Safety and Health at Work.2023; 14(1): 59.     CrossRef
  • Association between shift work or long working hours with metabolic syndrome: a systematic review and dose–response meta-analysis of observational studies
    Yihui Wang, Li Yu, Yinyan Gao, Lili Jiang, Lin Yuan, Pengju Wang, Yanwen Cao, Xuping Song, Long Ge, Guowu Ding
    Chronobiology International.2021; 38(3): 318.     CrossRef
  • Mediation analysis of dietary habits, nutrient intakes, daily life in the relationship between working hours of Korean shift workers and metabolic syndrome : the sixth (2013 ~ 2015) Korea National Health and Nutrition Examination Survey
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    Journal of Nutrition and Health.2018; 51(6): 567.     CrossRef
  • Efficacy of high dose vitamin D supplementation in improving serum 25-hydroxyvitamin D among laboratory personnel working at the Nepal National Center for Rheumatic Diseases
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    Biomedical Reports.2017;[Epub]     CrossRef
  • Short sleep duration, shift work, and actual days taken off work are predictive life-style risk factors for new-onset metabolic syndrome: a seven-year cohort study of 40,000 male workers
    Osamu Itani, Yoshitaka Kaneita, Mikiko Tokiya, Maki Jike, Atsushi Murata, Sachi Nakagome, Yuichiro Otsuka, Takashi Ohida
    Sleep Medicine.2017; 39: 87.     CrossRef
  • The association between long working hours and metabolic syndrome remains elusive
    Adriano M. Pimenta, Miguel A. Martinez-Gonzalez
    The European Journal of Public Health.2016; 26(3): 377.     CrossRef
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Research Article
Fatigue and related factors among hotel workers: the effects of emotional labor and non-standard working hours
Ju Jong Lee, Hyun Jey Moon, Kyung-Jae Lee, Joo Ja Kim
Ann Occup Environ Med 2014;26:51.   Published online December 18, 2014
DOI: https://doi.org/10.1186/s40557-014-0051-y
AbstractAbstract PDF
Objectives

This study assessed fatigue and its association with emotional labor and non-standard working hours among hotel workers.

Methods

A structured self-administered questionnaire was distributed to 1,320 employees of five hotels located in Seoul. The questionnaire survey included questions concerning the participants’ sociodemographics, health-related behaviors, job-related factors, emotional labor, and fatigue. Fatigue was assessed using the Multidimensional Fatigue Scale (MFS). Multiple logistic regression modeling was used to determine the associations between fatigue and emotional labor.

Results

Among male workers, there was a significant association between fatigue and both emotional disharmony (OR=5.52, 95% CI=2.35-12.97) and emotional effort (OR=3.48, 95% CI=1.54-7.86). These same associations were seen among the female workers (emotional disharmony: OR=6.91, 95% CI=2.93-16.33; emotional effort: OR=2.28, 95% CI=1.00-5.16).

Conclusion

These results indicate that fatigue is associated with emotional labor and, especially, emotional disharmony among hotel workers. Therefore, emotional disharmony management would prove helpful for the prevention of fatigue.


Citations

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  • A Selective RAG-Enhanced Hybrid ML-LLM Framework for Efficient and Explainable Fatigue Prediction Using Wearable Sensor Data
    Soonho Ha, Taeyoung Lee, Hyungjun Seo, Sujung Yoon, Hwamin Lee
    Bioengineering.2026; 13(1): 58.     CrossRef
  • Examining work-related suicide risk factors among food and beverage service industry workers
    Danya M. Serrano, Katrina A. Rufino, Hernan Aguilar
    Journal of Workplace Behavioral Health.2025; 40(4): 735.     CrossRef
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    Ghada O. El-Khawaga, Abdel-Hady El-Gilany, Heba Ali Hamed Mohamed
    BMC Public Health.2025;[Epub]     CrossRef
  • Shift Work, Sleep, Chronic Fatigue, and Mental Health Among Hotel Workers
    Marie-Anne S. Rosemberg, Joseph Tu, Julianne Armijo
    Western Journal of Nursing Research.2025; 47(10): 952.     CrossRef
  • Work-related risk factors of sleep apnea: evidence from the Korean work, sleep, and health study
    Heejoo Ko, Seong-Sik Cho, Hye-Eun Lee, Jeehee Min, Mo-Yeol Kang
    International Archives of Occupational and Environmental Health.2025; 98(9-10): 797.     CrossRef
  • Too sleepy to be innovative? Ethical leadership and employee service innovation behavior: A dual-path model moderated by sleep quality
    Muhammad Imran Rasheed, Zahid Hameed, Puneet Kaur, Amandeep Dhir
    Human Relations.2024; 77(6): 739.     CrossRef
  • The emotional ambiguities of healthcare professionals’ platform experiences
    Veronica Moretti, Riccardo Pronzato
    Social Science & Medicine.2024; 357: 117185.     CrossRef
  • Prevalence and characterization of sleep quality and insomnia in security guards working on the day and night shift in Delhi-NCR
    Manisha Singhania, Fauzia J. Sheereen, Taimul Ali, M. Kashif Reza, Abdurraheem Khan, Amir Iqbal, Fuzail Ahmad, Rashid A. Beg, Mohammad A. Shaphe, Ahmad H. Alghadir
    Sleep and Breathing.2024; 28(6): 2647.     CrossRef
  • Investigating the status of fatigue and the factors affecting it among women workers in Iran: A cross-sectional study in Kashan 2018
    HamidReza Saberi, Mahdi Malakoutikhah, SeyedGholam Abbas Mousavi, Fatemeh Safiyeh, Sima Memarnejad, Maryam Sarafrazian
    International Archives of Health Sciences.2022; 9(1): 3.     CrossRef
  • Causes and consequences of sleep loss and fatigue: The worker perspective in the coral reef tourism industry
    Amy C. Reynolds, Anja Pabel, Sally A. Ferguson, Anjum Naweed
    Annals of Tourism Research.2021; 88: 103160.     CrossRef
  • Fatigue on Oil Refinery Workers and Related Factors
    Iwan Muhamad Ramdan, Krishna Purnawan Candra, Ulfah Rana Mahdiyyah
    Open Access Macedonian Journal of Medical Sciences.2021; 9(E): 887.     CrossRef
  • The moderating role of leisure participation in work–leisure conflict for the reduction of burnout in hotels and travel agencies
    Ahmed M. Elbaz, Islam Salem, Ahmed Elsetouhi, Hany H. S. Abdelhamied
    International Journal of Tourism Research.2020; 22(3): 375.     CrossRef
  • The impact of emotional labor on the health in the workplace: a narrative review of literature from 2013–2018
    Norah Aung, Promise Tewogbola
    AIMS Public Health.2019; 6(3): 268.     CrossRef
  • Organizational support sources and job performance relations: what about occupational commitment?
    Esra Aydın, Ipek Kalemci Tüzün
    Anatolia.2019; 30(3): 379.     CrossRef
  • Relationship between concealment of emotions at work and musculoskeletal symptoms: results from the third Korean working conditions survey
    Kyungyong JUNG, Dae Hwan KIM, Ji Young RYU
    Industrial Health.2018; 56(5): 367.     CrossRef
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  • 9 Download
  • 19 Web of Science
  • 15 Crossref
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Research Article
Serum prostate-specific antigen levels and type of work in tire manufacturing workers
Soo-Hyeon Kim, Keun-Ho Jang, Won-Ju Park, Do-Hyeong Kwon, Won-Yang Kang, Hyeong-Min Lim, Jai-Dong Moon
Ann Occup Environ Med 2014;26:50.   Published online November 4, 2014
DOI: https://doi.org/10.1186/s40557-014-0050-z
AbstractAbstract PDF
Objectives

This study measures serum prostate-specific antigen (PSA) levels in tire-manufacturing workers, and attempts to find occupational or non-occupational factors that related to their PSA levels.

Methods

A total of 1,958 healthy male workers (1,699 were production workers and 259 were office workers) took PSA measurement for analysis.

Results

After adjusting for age, body mass index, hypertension, regular exercise, alcohol drinking and smoking, which were significantly related to serum PSA levels or known related factors of serum PSA levels, the geometric mean PSA levels were significantly high in the office workers (p = 0.017), the older age group (p < 0.001), the group with hypertension (p = 0.046) and the group of individuals that do not exercise regularly (p = 0.015) and the office workers were more likely to have a serum PSA level of ≥4.0 (OR 7.73, 95% CI: 2.78-21.46) or 2.5 ng/mL (OR 2.74, 95% CI: 1.49-5.08). After stratifying by age and adjusting aforementioned covariates, office workers 50 years of age and older had the significantly higher geometric mean PSA levels (p = 0.017) and were more likely to have a serum PSA level of ≥4.0 ng/mL (OR 12.90, 95% CI: 3.65-45.64) or 2.5 ng/mL (OR 3.90, 95% CI: 1.64-9.25) than production workers 50 years of age and older.

Conclusions

This study showed that serum PSA levels were significantly higher among the group with hypertension or the group of individuals that did not exercise regularly or group of office workers who were considered to have lesser physical activities.


Citations

Citations to this article as recorded by  
  • Night shiftwork and prostate-specific antigen level in a tire manufacturing factory
    Seunghyeon Cho, Won-Ju Park, WonYang Kang, Dae-Young Lim, Suwhan Kim, Jai-Dong Moon
    Annals of Occupational and Environmental Medicine.2019;[Epub]     CrossRef
  • Prostate Specific Antigen Screening among Men in Abakaliki, South East Nigeria
    E. N. Afogu, I. Sunday-Adeoye, K. C. Ekwedigwe, M. E. Isikhuemen, S. C. Okenwa, S. A. Popoola, M. O. Eliboh, I. C. Amamilo
    Open Journal of Urology.2017; 07(05): 79.     CrossRef
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Case Report
Acute liver injury in two workers exposed to chloroform in cleanrooms: a case report
Young Joong Kang, Jungho Ahn, Yang-In Hwang
Ann Occup Environ Med 2014;26:49.   Published online November 4, 2014
DOI: https://doi.org/10.1186/s40557-014-0049-5
AbstractAbstract PDF

We report 2 cases of hepatotoxicity in cleanroom workers due to high retained chloroform air concentrations. The women, aged 34 and 41 years, who had been working in a medical endoscopic device manufacturer as cleanroom workers for approximately 40–45 days suffered severe liver damage. Two measured time-weighted averages of the chloroform concentration in the air in the cleanroom were 82.74 and 64.24 ppm, which are more than 6 times the legal occupational exposure limit in Korea. Only 7% of the cleanroom air was newly introduced from outside. The clinical courses of these cases and workplace inspection, led us to conclude that both cases of hepatotoxicity were caused by chloroform exposure.


Citations

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  • Cytotoxicity and genotoxicity evaluation of chloroform using Vicia faba roots
    Xue Li, Ang Li, Ming Zhang, Tianpeng Gao
    Toxicology and Industrial Health.2023; 39(10): 603.     CrossRef
  • Acute liver injury in a non-alcoholic fatty liver disease patient with chloroform exposure: a case report
    Yosuke Suehiro, Takuro Uchida, Masataka Tsuge, Eisuke Murakami, Daiki Miki, Tomokazu Kawaoka, Michio Imamura, Hiroshi Aikata, Koji Arihiro, Shiro Oka
    Clinical Journal of Gastroenterology.2023;[Epub]     CrossRef
  • A case report of toxic hepatitis caused by chloroform in automotive parts manufacturer coating process
    Jong Hyun Hwang, Jung Il Kim
    Annals of Occupational and Environmental Medicine.2022;[Epub]     CrossRef
  • Exposure to organic solvents and hepatotoxicity
    Cristiano Brauner, Dvora Joveleviths, Mário R. Álvares-da-Silva, Norma Marroni, Silvia Bona, Elizângela Schemitt, Raissa Nardi
    Journal of Environmental Science and Health, Part A.2020; 55(10): 1173.     CrossRef
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    Emily A. Minor, Mackenzie S. Newman, Justin T. Kupec
    Case Reports in Hepatology.2018; 2018: 1.     CrossRef
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    Lei WANG, Xiankui LI, Cai CHEN
    Biomedical Research.2018; 39(2): 87.     CrossRef
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  • 7 Download
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Research Article
Risk factors of musculoskeletal symptoms in university hospital nurses
Eunkwang Ryu, Byeongjin Ye, Youngil Yi, Jungwon Kim
Ann Occup Environ Med 2014;26:47.   Published online November 4, 2014
DOI: https://doi.org/10.1186/s40557-014-0047-7
AbstractAbstract PDF
Objectives

The purpose of this study was to investigate musculoskeletal symptom prevalence in university hospital nurses and explore the relation between musculoskeletal symptom prevalence and work related factors.

Methods

A structured questionnaire was conducted with 620 nurses in a university hospital to look into the characters of responsibility and musculoskeletal symptom prevalence. The questionnaire respondents numbered 534, so the response rate was 86.1%. Among the respondents, three who gave insincere answers were excluded. The final study population was 531 respondents. ANSI Z-365 checklist was applied to look into ergonomic characteristics, and Korean Occupational Stress Scale Short Form was employed to measure job stress.

Results

In the case of the whole body, symptom prevalence amounted to 70.8%. Regarding each body region, shoulder symptom prevalence accounted for the highest, or 44.8%, waist 40.7%, and neck 33.3% in order. According to multiple logistic regression analysis, in the case of the whole body, the group with a high ANSI checklist grade had odds ratio of 3.59 (95% CI 1.48 ~ 8.76), and the group with high job stress had 3.19 (95% CI 2.01 ~ 5.07).

Conclusion

Regarding the occupational factors related to musculoskeletal symptoms of university hospital nurses, it was found that ANSI Z-365 checklist high risk group, total job tenure, department, shiftworks, and job stress had high relation with musculoskeletal symptoms. It is necessary to find an ergonomic solution and a stress reduction plan to prevent musculoskeletal disease.


Citations

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    Karolis Senvaitis, Aušra Adomavičienė, Kristina Daunoravičienė
    Sensors.2025; 25(2): 444.     CrossRef
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    Karolis Senvaitis, Aušra Adomavičienė, Alina Tomaševič, Radvilė Kernagytė, Ada Petrauskaitė, Kristina Daunoravičienė
    Applied Sciences.2024; 14(17): 8076.     CrossRef
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    Yibeltal Assefa Atalay, Natnael Atnafu Gebeyehu, Kelemu Abebe Gelaw
    Journal of Occupational Medicine and Toxicology.2024;[Epub]     CrossRef
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    Husain Nasaif, Maryam Alaradi, Ridha Hammam, Muna Bucheeri, Maroom Abdulla, Hameed Abdulla
    International Journal of Occupational Safety and Ergonomics.2023; 29(1): 192.     CrossRef
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    Jean-Bernard Henrotin, Véronique Petit-Gelin
    Work.2022; 72(4): 1239.     CrossRef
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    Dechasa Adare Mengistu, Gebisa Dirirsa Gutema, Yohannes Mulugeta Demmu, Addisu Alemu, Yohanis Alemeshet Asefa
    INQUIRY: The Journal of Health Care Organization, Provision, and Financing.2022;[Epub]     CrossRef
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    Marco Clari, Alessandro Godono, Giacomo Garzaro, Gianluca Voglino, Maria Rosaria Gualano, Giuseppe Migliaretti, Attilia Gullino, Catalina Ciocan, Valerio Dimonte
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    Kefale Getie, Gebreslassie Kahsay, Alemu Kassaw, Gidey Gomera, Abayneh Alamer, Tesfay Hailu
    Journal of Pain Research.2021; Volume 14: 83.     CrossRef
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Research Article
Emotional labor and dysmenorrhea in women working in sales and call centers
In-Jung Cho, Hyunjoo Kim, Sinye Lim, Sung-Soo Oh, Sungjin Park, Hee-Tae Kang
Ann Occup Environ Med 2014;26:45.   Published online November 7, 2014
DOI: https://doi.org/10.1186/s40557-014-0045-9
AbstractAbstract PDF
Objectives

This study was conducted to investigate the association between emotional labor and dysmenorrhea among women working in sales and call centers in Seoul, South Korea.

Methods

Working women in sales jobs and call centers in Seoul were interviewed face-to-face by well-trained interviewers. In total, 975 participants were analyzed in the final model. Emotional labor was measured using a constructed questionnaire with two components: an emotive effort component with three questions and an emotive dissonance component with five questions. To examine the association between emotional labor and dysmenorrhea, chi-squared tests and logistic regression were applied.

Results

The prevalence of dysmenorrhea among sales workers and call center workers were 43.0% and 61.1%, respectively. The adjusted odds ratios (OR) of emotive effort and emotive dissonance for dysmenorrhea in call center workers were 1.88 (95% confidence interval [CI], 1.07–3.28) and 1.72 (95% CI, 1.13–2.63), respectively. The adjusted OR of emotive effort and emotive dissonance for dysmenorrhea in sales workers were 1.71 (95% CI, 0.92–3.16) and 1.15 (95% CI, 0.67–1.98), respectively.

Conclusions

Emotional labor was found to be associated with dysmenorrhea in call center workers. Further studies to investigate other factors, such as management strategies and the relationship between emotional labor and dysmenorrhea, are needed to support interventions to prevent dysmenorrhea that will further promote the quality of health and life of working women.


Citations

Citations to this article as recorded by  
  • Dysmenorrhea among working women and its effect on their work productivity and activity impairment
    Hend Serya, Rania El-Kurdy, Ebrahim Serria, Abdel-Hady El-Gilany
    Journal of the Egyptian Public Health Association.2025;[Epub]     CrossRef
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    Chen X. Chen, Sarah K. Rogers, Rui Li, Rachel J. Hinrichs, J. Dennis Fortenberry, Janet S. Carpenter
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    Chiharu Matsubara, Kiyoko Kabeyama
    Journal of Japan Academy of Nursing Science.2023; 43: 55.     CrossRef
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    Sung Kyu Park, Han Cheol Heo, Joon Sakong, Man Joong Jeon
    Annals of Occupational and Environmental Medicine.2019;[Epub]     CrossRef
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    Norah Aung, Promise Tewogbola
    AIMS Public Health.2019; 6(3): 268.     CrossRef
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    Yeunhee Kwak, Yoonjung Kim
    Women & Health.2018; 58(10): 1135.     CrossRef
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  • 5 Download
  • 6 Web of Science
  • 6 Crossref
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Research Article
Work-relatedness of lung cancer by smoking and histologic type in Korea
Young-Il Lee, Sang-Gil Lee, Dong-Mug Kang, Jong-Eun Kim, Young-Ki Kim, Jong-Han Leem, Hwan-Cheol Kim
Ann Occup Environ Med 2014;26:43.   Published online December 1, 2014
DOI: https://doi.org/10.1186/s40557-014-0043-y
AbstractAbstract PDF
Objectives

This study investigated the distribution of causative agents related to occupational lung cancer, their relationships with work, and associations between work-relatedness and the histologic type of lung cancer.

Methods

We used data from the occupational surveillance system in Korea in 2013. In addition, data from 1,404 participants diagnosed with lung cancer were collected through interviews. We included the patients’ longest-held job in the analysis. Work-relatedness was categorized as “definite,” “probable,” “possible,” “suspicious,” “none,” or “undetermined.”

Results

Among the subjects, 69.3% were men and 30.7% were women. Regarding smoking status, current smokers were the most prevalent (35.5%), followed by non-smokers (32.3%), ex-smokers (32.2%). Regarding the causative agents of lung cancer, asbestos (1.0%) and crystalline silica (0.9%) were the most common in definite work-related cases, while non-arsenical insecticide (2.8%) was the most common in probable cases followed by diesel engine exhaust (1.9%) and asbestos (1.0%). Regarding histologic type, adenocarcinoma was the most common (41.7%), followed by squamous cell carcinoma (21.2%). Among current smokers, squamous cell carcinoma was the most common among definite and probable cases (13.4%), while non-small cell lung cancer was the least common (7.1%). Among non-smokers, squamous cell carcinoma was the most common (21.4%), while the least common was adenocarcinoma (1.6%).

Conclusions

Approximately, 9.5% of all lung cancer cases in Korea are occupational-related lung cancer. Well-known substances associated with lung cancer, such as crystalline silica, asbestos, and diesel engine exhaust, are of particular concern. However, the histologic types of lung cancer related to smoking were inconsistent with previous studies when work-relatedness was taken into account. Future studies are required to clarify the incidence of occupational lung cancer in agricultural workers exposed to non-arsenical insecticides and the associations between work-relatedness and the histologic type of lung cancer.


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  • KL-6 in Obstructive Sleep Apnea: A Potential Biomarker of Subclinical Lung Injury
    Sei Won Kim, Hwan Hee Kim, Heayon Lee, In Kyoung Kim, Sang Haak Lee, Hyeon Hui Kang
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  • Development of a Protein Biomarker Panel to Detect Non–Small-Cell Lung Cancer in Korea
    Young Ju Jung, Evaldas Katilius, Rachel M. Ostroff, Youndong Kim, Minkyoung Seok, Sujin Lee, Seongsoo Jang, Woo Sung Kim, Chang-Min Choi
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Research Article
The association between shift work and hyperuricemia in steelmaking male workers
Jae-Seok Oh, Won-Jun Choi, Min-Kee Lee, Sung-Woo Han, Seung-Ho Song, Jong-Wan Yun, Sang-Hwan Han
Ann Occup Environ Med 2014;26:42.   Published online November 4, 2014
DOI: https://doi.org/10.1186/s40557-014-0042-z
AbstractAbstract PDF
Objectives

The aim of this study was to examine the association between shift work and hyperuricemia among steel company workers.

Methods

We examined 1,029 male workers at a Korean steel company between June 6 and June 28, 2013. We conducted anthropometric measurements, questionnaire surveys, and blood tests. Hyperuricemia was defined as a serum uric acid concentration of ≥7.0 mg/dL. Logistic regression analyses were performed. In the full model, analysis was adjusted for covariates including age, body mass index, lifestyle factors, and comorbidities. The odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated for all models.

Results

The participants included 276 daytime workers and 753 shift workers. Among daytime workers, 72 (26.1%) individuals had hyperuricemia, as did 282 (37.5%) individuals among shift workers (p <0.001). There was a statistically significant association between shift work and hyperuricemia. In the unadjusted model, the OR of shift work was 1.70 (95% CI 1.25-2.31) for hyperuricemia. In the full model, the OR of shift work was also statistically significant after adjustment for covariates (OR 1.41, 95% CI 1.02-1.96).

Conclusions

Among male steel workers, a significant association between shift work and hyperuricemia was observed.


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    Hao Wang, Mingxuan Liu, Cunxiang Xie, Luming Zhao, Hailong Wang
    Journal of Inflammation Research.2025; Volume 18: 8141.     CrossRef
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    Guodong Ha, Jiawei Wu, Jing Hu, Xun Wang, Yijie Xie, Zhengyu Zhao, Dingjun Cai
    Nature and Science of Sleep.2025; Volume 17: 2321.     CrossRef
  • Influence of occupational exposure on hyperuricemia in steelworkers: a nested case–control study
    Yuanyu Chen, Yongzhong Yang, Ziwei Zheng, Hui Wang, Xuelin Wang, Zhikang Si, Rui Meng, Guoli Wang, Jianhui Wu
    BMC Public Health.2022;[Epub]     CrossRef
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    Wen Wang, Qian Wang, Nan Yang
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    Niamh Fanning, Tony R. Merriman, Nicola Dalbeth, Lisa K. Stamp
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Research Article
Association between long working hours and serum gamma-glutamyltransferase levels in female workers: data from the fifth Korean National Health and Nutrition Examination Survey (2010-2011)
Seung-Gwon Park, Yong-Jin Lee, Jung-Oh Ham, Eun-Chul Jang, Seong-Woo Kim, Hyun Park
Ann Occup Environ Med 2014;26:40.   Published online December 1, 2014
DOI: https://doi.org/10.1186/s40557-014-0040-1
AbstractAbstract PDF
Objectives

The present study investigated the association between long working hours and serum gamma-glutamyltransferase (GGT) levels, a factor influencing the incidence of cardiovascular disease.

Methods

Data from the fifth Korean National Health and Nutrition Examination Survey (2010–2011) were used to analyze 1,809 women. Subjects were divided into three groups based on the number of weekly working hours: ≤29, 30–51, and ≥52 hours per week. Complex samples logistic regression was performed after adjusting for general and occupational factors to determine the association between long working hours and high serum GGT levels.

Results

The prevalence of high serum GGT levels in groups with ≤29, 30–51, and ≥52 working hours per week was 22.0%, 16.9%, and 26.6%, respectively. Even after adjusting for general and occupational factors, those working 30–51 hours per week had the lowest prevalence of high serum GGT levels. Compared to those working 30–51 hours per week, the odds ratios (OR) of having high serum GGT levels in the groups with ≥52 and ≤29 working hours per week were 1.56 (95% confidence interval [CI], 1.10–2.23) and 1.53 (95% CI, 1.05–2.24), respectively.

Conclusions

Long working hours were significantly associated with high serum GGT levels in Korean women.


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  • Multi-ancestry sleep-by-SNP interaction analysis in 126,926 individuals reveals lipid loci stratified by sleep duration
    Raymond Noordam, Maxime M. Bos, Heming Wang, Thomas W. Winkler, Amy R. Bentley, Tuomas O. Kilpeläinen, Paul S. de Vries, Yun Ju Sung, Karen Schwander, Brian E. Cade, Alisa Manning, Hugues Aschard, Michael R. Brown, Han Chen, Nora Franceschini, Solomon K.
    Nature Communications.2019;[Epub]     CrossRef
  • The association between long working hours and marital status change: middle-aged and educated Korean in 2014–2015
    Hyunil Kim, Byung-Seong Suh, Won-Cheol Lee, Han-Seur Jeong, Kyung-Hun Son, Min-Woo Nam, Hyeong-Cheol Kim
    Annals of Occupational and Environmental Medicine.2019;[Epub]     CrossRef
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Research Article
The association between psychiatric disorders and work-related problems among subway drivers in Korea
Se-eun Kim, Hyoung-Ryoul Kim, Jong-Ik Park, Hae Woo Lee, Jongin Lee, Junsu Byun, Hyeon Woo Yim
Ann Occup Environ Med 2014;26:39.   Published online November 1, 2014
DOI: https://doi.org/10.1186/s40557-014-0039-7
AbstractAbstract PDF
Objectives

This study aimed to find the prevalence and occupational risk factors for major psychiatric disorders among subway drivers in South Korea.

Methods

Of all 998 current subway drivers, 995 participated in this study. The Korean version of the Composite International Diagnostic Interview (K-CIDI 2.1) was administered by trained interviewers to diagnose psychiatric disorders in all participants. The questions on socio-demographic characteristics and working conditions included some questions related to a person under train (PUT) experience and work-related problems. One-year prevalence and lifetime prevalence of major depressive disorder (MDD), post-traumatic stress disorder (PTSD), and panic disorder were diagnosed through the interview. The standardized prevalence ratios (SPRs) of these three disorders were calculated in the sample of subway drivers using the 2011 Korean National Epidemiologic Survey data as a basis. Multiple logistic regressions were performed to determine the association between work-related factors and the prevalence of the psychiatric disorders.

Results

The standardized prevalence ratios (SPRs) for a 1-year prevalence of MDD and PTSD among subway drivers were 1.1 (95% CI 0.7-1.7) and 5.6 (95% CI 3.1-8.8), respectively. Conflict with passengers was significantly associated with an increased risk for both MDD and PTSD in 1-year and in lifetime prevalence. Experiencing a sudden stop due to an emergency bell increased the risk of the lifetime prevalence of MDD (OR 2.61, 95% CI 1.14-6.97) and PTSD (OR 7.53, 95% CI 1.77-32.02). The risk of PTSD significantly increased among drivers who once experienced a near accident in terms of both the 1-year prevalence (OR 8.81, 95% CI 1.96-39.3) and the lifetime prevalence (OR 6.36, 95% CI 2.40-16.90).

Conclusions

PTSD and panic disorder were more prevalent among subway drivers than in the general population. We found that having a conflict with passengers, a near accident, and a breakdown while driving can be risk factors for psychiatric disorders among subway drivers. Therefore, a prompt and sensitive approach should be introduced for these high risk groups within the subway company.


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  • Health Effects of Person-Under-Train Incidents on Train Drivers—A Systematic Review
    Johannes Lay, Andrea Kaifie
    Healthcare.2025; 13(3): 248.     CrossRef
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    Shenglin Ye, Zhongjian Jia, Zhengtao Ai
    Building and Environment.2025; 284: 113457.     CrossRef
  • Impact of Railway Critical Incidents on Train Drivers and Effectiveness of Critical Incident Management and Support Protocols
    Cécile Bardon, Luc Dargis, Brian L. Mishara
    Journal of Occupational & Environmental Medicine.2022; 64(2): e70.     CrossRef
  • Prevalence and Risk Factors of Post-Traumatic Stress Disorder in Survivors of a Cohort of Road Accident Victims in Benin: Results of a 12-Month Cross-Sectional Study
    Donatien Daddah, Yolaine Glèlè Ahanhanzo, Alphonse Kpozehouen, Bella Hounkpe Dos Santos, Edgard-Marius Ouendo, Alain Levêque
    Journal of Multidisciplinary Healthcare.2022; Volume 15: 719.     CrossRef
  • Evaluation of the Implementation of a Railway Critical Incident Management and Support Protocol to Help Train Drivers Cope With Accidents and Suicides
    Cécile Bardon, Luc Dargis, Brian Mishara
    Journal of Occupational & Environmental Medicine.2021; 63(8): e495.     CrossRef
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    Pieter Coenen, Henk F van der Molen
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    Mengesha Srahbzu Biresaw, Enguday Tirfeneh Gebeyehu
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    Seyed Alireza Samerei, Kayvan Aghabayk, Mohamad Hosein Akbarzade
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    Gabriela Petereit-Haack, Ulrich Bolm-Audorff, Karla Romero Starke, Andreas Seidler
    International Journal of Environmental Research and Public Health.2020; 17(24): 9369.     CrossRef
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    Gerard Dunleavy, Ram Bajpai, André Comiran Tonon, Kei Long Cheung, Thuan-Quoc Thach, Yuri Rykov, Chee-Kiong Soh, Hein de Vries, Josip Car, Georgios Christopoulos
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  • Posttraumatic stress reactions of underground drivers after suicides by jumping to arriving trains; feasibility of an early stepped care outpatient intervention
    Giancarlo Giupponi, Heike Thoma, Dorian Lamis, Alberto Forte, Maurizio Pompili, Hans-Peter Kapfhammer
    Journal of Trauma & Dissociation.2019; 20(5): 495.     CrossRef
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    Ziwei Zhu, Linxiong Wu, Aihua Liu, Mei Zhou, Fukai Bao, Cuiping Xu, Jiaru Yang, Hua Zhao
    Open Journal of Immunology.2016; 06(01): 7.     CrossRef
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Case Report
High lead exposure in two leaded bronze ingot foundry workers
Yoojun Song, Chunhui Suh, Shin-Ae Kim, Nami Kim, Sung-Min Kim, Seong-Wook Jeong, Se-Yeong Kim, Kun-Hyung Kim, Jeong-Ho Kim, Byung-Chul Son, Chae-Kwan Lee, Jong-Tae Lee
Ann Occup Environ Med 2014;26:38.   Published online December 1, 2014
DOI: https://doi.org/10.1186/s40557-014-0038-8
AbstractAbstract PDF
Background

Awareness about lead poisoning in South Korea has increased; however, occupational exposures occurring in small-scale businesses have not been thoroughly investigated. We report two cases of high lead exposure in a leaded bronze ingot foundry.

Case presentation

Two employees, a 54-year-old primary operator and a 46-year-old assistant, at a small-scale metalworking company who had been employed for 18 years and 1 month, respectively, showed elevated blood lead levels (61.1 μg/dL and 51.7 μg/dL, respectively) at an occupational health checkup. Neither worker complained of abnormal symptoms nor signs related to lead poisoning. Health assessment follow-ups were conducted and biological exposure indices of lead were calculated every four weeks. After the initial follow-up assessment, both workers were relocated from the foundry process to the metalworking process. In addition, a localized exhaust system was installed after the second follow-up.

Conclusions

Foundry workers in a small-scale businesses might be at high risk of lead exposure because these businesses might be vulnerable to poor industrial hygiene. Therefore, regular occupational health checkups are required.


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  • Occupational Lead Exposure Among Civilian Indoor Shooting Range Workers in Korea: A Report of Blood Lead Levels and Airborne Lead
    Sungjin Park, Jaeyoung Park, Bumjoon Lee, Yi-Ryoung Lee, Jiho Kim, Younmo Cho, Hyeongyeong Choi, Kyeongyeon Kim
    Journal of Korean Medical Science.2025;[Epub]     CrossRef
  • Comparison of Blood Lead Levels in Children and Adolescents with and Without Functional Abdominal Pain
    Fatemeh Famouri, Maryam Yazdi, Awat Feizii, Hossein Saneian, Peiman Nasri, Roya Kelishadi
    Advanced Biomedical Research.2023;[Epub]     CrossRef
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    Ziyao Huang
    Frontiers in Public Health.2022;[Epub]     CrossRef
  • A systematic review of clinical and laboratory findings of lead poisoning: lessons from case reports
    Saeed Samarghandian, Farshad M. Shirazi, Farhad Saeedi, Babak Roshanravan, Ali Mohammad Pourbagher-Shahri, Emad Yeganeh Khorasani, Tahereh Farkhondeh, Jan Olav Aaseth, Mohammad Abdollahi, Omid Mehrpour
    Toxicology and Applied Pharmacology.2021; 429: 115681.     CrossRef
  • Exposure to lead and other toxic metals from informal foundries producing cookware from scrap metal
    Renee Anne Street, Walter Goessler, Saloshni Naidoo, Busisiwe Shezi, Nokulunga Cele, Jaqueline Rieger, Karl Ettinger, Tarylee Reddy, Angela Mathee
    Environmental Research.2020; 191: 109860.     CrossRef
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    Gilseung Ahn, Sun Hur, Myung-Chul Jung
    International Journal of Occupational Safety and Ergonomics.2020; 26(2): 336.     CrossRef
  • Challenges in diagnosing lead poisoning: A review of occupationally and nonoccupationally exposed cases reported in India
    Monica Shirley Mani, Divyani Gurudas Nayak, Herman Sunil Dsouza
    Toxicology and Industrial Health.2020; 36(5): 346.     CrossRef
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    Kyung Wook Kang, Won-Ju Park
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    Won-Ju Park, Suk-Ho Lee, Se-Ho Lee, Hye-Sik Yoon, Jai-Dong Moon
    Journal of Korean Medical Science.2016; 31(4): 497.     CrossRef
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Case Report
A case of multiple myeloma in a poultry worker
Pil Kyun Jung, Inah Kim, Inhyo Park, Chinyon Kim, Eun-A Kim, Jaehoon Roh
Ann Occup Environ Med 2014;26:35.   Published online November 1, 2014
DOI: https://doi.org/10.1186/s40557-014-0035-y
AbstractAbstract PDFSupplementary Material
Background

Livestock breeders including poultry workers are exposed to various agricultural chemicals including pesticides and/or organic solvents. Multiple myeloma is a rare disease in Korea, and few reports have investigated the influence of occupational exposures on multiple myeloma occurrence.

Case presentation

A 61-year-old male poultry farm worker presented with bone pain and generalized weakness. A bone marrow biopsy was performed, and he was diagnosed with multiple myeloma. The patient had worked in a poultry farm for 16 years and was exposed to various pesticides and organic solvents such as formaldehyde without any proper personal protective equipment. Results of the work reenactment revealed that the concentration of formaldehyde (17.53 ppm) greatly exceeded the time-weighted average (0.5 ppm) and short-term exposure limit (1.0 ppm) suggested in the Korean Industrial Safety and Health Act.

Conclusions

This case report suggests that poultry workers may be exposed to high levels of various hazardous chemicals including pesticides and/or organic solvents. Numerous previous studies have suggested an association between multiple myeloma and exposure to agricultural chemicals; thus, multiple myeloma in this patient might have resulted from the prolonged, high exposure to these chemicals.

Electronic supplementary material

The online version of this article (doi:10.1186/s40557-014-0035-y) contains supplementary material, which is available to authorized users.


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  • Occupational risk factors in health of broiler-farm workers: A systematic review
    Claudia dos Anjos Magri, Rodrigo Garófallo Garcia, Erlaine Binotto, Nilsa Duarte da Silva Lima, Irenilza de Alencar Nääs, Sarah Sgavioli, Maria Fernanda de Castro Burbarelli
    Archives of Environmental & Occupational Health.2021; 76(8): 482.     CrossRef
  • Does formaldehyde have a causal association with nasopharyngeal cancer and leukaemia?
    Soon-Chan Kwon, Inah Kim, Jaechul Song, Jungsun Park
    Annals of Occupational and Environmental Medicine.2018;[Epub]     CrossRef
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Research Article
The relationship between working condition factors and well-being
Bum-Joon Lee, Shin-Goo Park, Kyoung-Bok Min, Jin-Young Min, Sang-Hee Hwang, Jong-Han Leem, Hwan-Cheol Kim, Sung-Hwan Jeon, Yong-Seok Heo, So-Hyun Moon
Ann Occup Environ Med 2014;26:34.   Published online November 4, 2014
DOI: https://doi.org/10.1186/s40557-014-0034-z
AbstractAbstract PDF
Objectives

Working conditions can exert influence on the physical, mental, and even social health of workers. Well-being is an appropriate index for the evaluation of a person’s overall health. This paper investigated the association between various working conditions and worker’s well-being.

Methods

Data from 10,019 interviews were collected from the second wave of the Korean Working Conditions Survey (2010) conducted by the Korea Occupational Safety and Health Agency between June and October 2010. The data from 5,995 employed workers were examined in this study. Well-being was measured through the WHO Five Well-Being Index (1998 version). Sociodemographic and working conditions were analyzed. Adjusted odds ratios for well-being were calculated with adjusted sociodemographic factors, working condition factors, or both.

Results

Workers’ well-being was significantly higher when they were satisfied with their working conditions (OR = 1.656, 95% CI = 1.454–1.885), when their actual working hours were the same as their anticipated working hours (OR = 1.366, 95% CI: 1.120–1.666) or exceeding less than 10 hours (OR = 1.245, 95% CI: 1.004-1.543), and when their employment was stable (OR = 1.269, 95% CI: 1.098–1.467).

Conclusions

This study supports the association between working condition factors and well-being in workers.


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    Safety Science.2022; 146: 105533.     CrossRef
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    Michal Itzick, Maya Kagan
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    Silja Fiedler, Holger Pfaff, Renate Soellner, Timo-Kolja Pförtner
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    Bum-Joon LEE, Dirga Kumar LAMICHHANE, Dal-Young JUNG, So-Hyun MOON, Seong-Jin KIM, Hwan-Cheol KIM
    INDUSTRIAL HEALTH.2016; 54(3): 237.     CrossRef
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    Ji Park, Mi Han, Jong Park, So Ryu
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    Annals of Occupational and Environmental Medicine.2016;[Epub]     CrossRef
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Research Article
Workers’ experiences with compensated sick leave due to musculoskeletal disorder: a qualitative study
Min Choi, Hyoung-Ryoul Kim, Jinwoo Lee, Hye-Eun Lee, Junsu Byun, Jong Uk Won
Ann Occup Environ Med 2014;26:33.   Published online November 4, 2014
DOI: https://doi.org/10.1186/s40557-014-0033-0
AbstractAbstract PDF
Objectives

The most common occupational disease that is compensated by Industrial Accident Compensation Insurance (IACI) in Korea is musculoskeletal disease (MSD). Although complaints about the workers’ compensation system have been raised by injured workers with MSD, studies that examine workers’ experiences with the Korean system are rare. This paper is a qualitative study designed to examine injured workers’ experiences with the workers’ compensation system in Korea. The aim of this study is to explore the drawbacks of the workers’ compensation system and to suggest ways to improve this system.

Methods

All workers from an automobile parts factory in Anseong, GyeongGi province who were compensated for MSD by IACI from January 2003 to August 2013 were invited to participate. Among these 153 workers, 142 workers completed the study. Semi-structured open-ended interviews and questionnaires were administered by occupational physicians. The responses of 131 workers were analyzed after excluding 11 workers, 7 of whom provided incomplete answers and 4 of whom were compensated by accidental injury. Based on their age, disease, department of employment, and compensation time, 16 of these 131 workers were invited to participate in an individual in-depth interview. In-depth interviews were conducted by one of 3 occupational physicians until the interview contents were saturated.

Results

Injured workers with MSD reported that the workers’ compensation system was intimidating. These workers suffered more emotional distress than physical illness due to the workers’ compensation system. Injured workers reported that they were treated inadequately and remained isolated for most of the recuperation period. The compensation period was terminated without ample guidance or a plan for an appropriate rehabilitation process.

Conclusions

Interventions to alleviate the negative experiences of injured workers, including quality control of the medical care institutions and provisions for mental and psychological care for injured workers, are needed to help injured workers return to work earlier and more healthy.


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    Gatot Santoso, S. Sugiharto, Abdul Mughni, Muhammad Imam Ammarullah, Athanasius P. Bayuseno, J. Jamari
    Open Access Macedonian Journal of Medical Sciences.2022; 10(F): 146.     CrossRef
  • Factors related to the physician and the employer influencing successful return to work in Korea: results from the first panel study of workers’ compensation insurance (PSWCI)
    Wanhyung Lee, Jin-Ha Yoon, Jaehoon Roh, Yeong-Kwang Kim, Hongdeok Seok, June-Hee Lee, Jong-Uk Won
    Annals of Occupational and Environmental Medicine.2015;[Epub]     CrossRef
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    Jongin Lee, Min Choi, Sung Hye Park, Hyoung-Ryoul Kim, Hye-Eun Lee
    Annals of Occupational and Environmental Medicine.2015;[Epub]     CrossRef
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Research Article
Presenteeism among self-employed workers: Korean working conditions survey
Min-Su Kim, Jae Bum Park, Kyoung-Bok Min, Kyung-Jong Lee, Kimin Kwon
Ann Occup Environ Med 2014;26:32.   Published online October 1, 2014
DOI: https://doi.org/10.1186/s40557-014-0032-1
AbstractAbstract PDF
Objective

Presenteeism has become a public concern recently. Thus, we aimed to understand the relationship between self-employed workers and presenteeism using a nationally representative sample of Korean workers.

Methods

Using data from the Korean Working Conditions Survey conducted in 2011, a total of 43,392 workers including paid employees and self-employed workers were analyzed. The effect of employment status on presenteeism was analyzed using logistic regression analysis. The independent variables were socioeconomic characteristics, working conditions, and working environments.

Results

Among the 43,392 workers, 34,783 were paid and 8,609 were self-employed. Self-employed workers were more likely to exhibit presenteeism than were paid workers. An elevated odds ratio of 1.27 (95% CI 1.19-1.36) was found for presenteeism among self-employed workers.

Conclusion

Being self-employed was significantly related with exhibiting presenteeism. Additional research should investigate whether other factors mediate the relationship between employment status and presenteeism as well as ways to reduce presenteeism among self-employed workers.


Citations

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  • Effect of Exposure to Physical Environmental Risk Factors of Korean Wage Workers on Presenteeism using the 6th Korean Working Conditions Survey (KWCS): Focusing on Gender Differences
    Yoon Ho Lee, Jeong-Beom Lee, Mid-Eum Moon, Myoung-Je Song, Jong-Sun Kim, Hwa-Young Lee, Eun Chul Jang, Soon-Chan Kwon, Young-Sun Min, In-Ho Lee
    Journal of The Korean Society of Living Environmental System.2025; 32(3): 359.     CrossRef
  • Impact of Changes in Type of Employment on Absenteeism/Presenteeism Among Korean Workers
    Yunjun Park, Wanhyung Lee
    Journal of Occupational & Environmental Medicine.2025; 67(11): e807.     CrossRef
  • Association Between Sickness Presenteeism and Depressive Symptoms by Occupation and Employment Type During the COVID-19 Pandemic
    Minkoo Kang, Won-Tae Lee, Byungyoon Yun, Jin-Ha Yoon
    Safety and Health at Work.2024; 15(3): 338.     CrossRef
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    Sungjin Park, June-Hee Lee, Jongin Lee
    International Journal of Environmental Research and Public Health.2022; 19(12): 7380.     CrossRef
  • Impacts of presenteeism on work-related injury absence and disease absence
    Youna Won, Hwan-Cheol Kim, Jiho Kim, Minsun Kim, Seong-Cheol Yang, Shin-Goo Park, Jong-Han Leem
    Annals of Occupational and Environmental Medicine.2022;[Epub]     CrossRef
  • Sickness presenteeism: Are we sure about what we are studying? A research based on a literature review and an empirical illustration
    Albert Navarro, Sergio Salas‐Nicás, Clara Llorens, Salvador Moncada, Emilia Molinero‐Ruíz, David Moriña
    American Journal of Industrial Medicine.2019; 62(7): 580.     CrossRef
  • Ziek, maar toch op de zaak
    N. C. Hageman, E. C. Wijnvoord
    TBV – Tijdschrift voor Bedrijfs- en Verzekeringsgeneeskunde.2019; 27(3): 7.     CrossRef
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    Jin-Young Min, Hye-Jin Kim, Kyoug-Bok Min
    Journal of Global Health Reports.2019;[Epub]     CrossRef
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    Mar Blasco-Blasco, María Teresa Ruiz-Cantero, Lucero Aida Juárez-Herrera y Cairo, Vega Jovaní, Eliseo Pascual
    The Journal of Rheumatology.2017; 44(10): 1429.     CrossRef
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Research Article
The association between concealing emotions at work and medical utilization in Korea
Hongdeok Seok, Jin-Ha Yoon, Wanhyung Lee, June-Hee Lee, Pil Kyun Jung, Inah Kim, Jong-Uk Won, Jaehoon Roh
Ann Occup Environ Med 2014;26:31.   Published online October 1, 2014
DOI: https://doi.org/10.1186/s40557-014-0031-2
AbstractAbstract PDF
Objectives

We aimed to investigate the association between concealing emotions at work and medical utilization.

Methods

Data from the 2007–2009 4th Korea National Health and Nutrition Examination Survey (KNHANES IV) was used, 7,094 participants (3,837 males, 3,257 females) aged between 20 and 54 who were economically active and completed all necessary questionnaire items were included. Odds ratios (ORs) and 95% confidence intervals (95% CI) for differences in hospitalization, outpatient visits, and pharmaceutical drug use between those who concealed their emotions and those who did not were investigated using logistic regression models with and without gender stratification.

Results

Among those who concealed their emotions (n = 2,763), 47.4% were females, and 50.1% had chronic disease. In addition, 9.7% of the concealing emotions group had been hospitalized within the last year, 24.8% had been outpatients in the last two weeks, and 28.3% had used pharmaceutical drugs in the last two weeks.

All ORs represent the odds of belonging to the concealing emotions group over the non-concealing emotions group. After adjustment for individual, occupational, socioeconomic and disease factors, the adjusted ORs (95% CI) in hospitalization are 1.29 (1.08 ~ 1.53) in the total population, 1.25 (0.98 ~ 1.60) in males and 1.30 (1.02 ~ 1.66) in females, in outpatient visits are 1.15 (1.02 ~ 1.29) in the total population, 1.05 (0.88 ~ 1.24) in males and 1.25 (1.06 ~ 1.47) in females and in pharmaceutical drug use are 1.12 (1.01 ~ 1.25) in the total population, 1.08 (0.92 ~ 1.27) in males and 1.14 (0.98 ~ 1.33) in females.

Conclusions

Those who concealed their emotions at work were more likely to use medical services. Moreover, the health effects of concealing emotions at work might be more detrimental in women than in men.


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    Jae-Gwang Lee, Guang Hwi Kim, Sung Won Jung, Sang Woo Kim, June-Hee Lee, Kyung-Jae Lee
    Annals of Occupational and Environmental Medicine.2018;[Epub]     CrossRef
  • Association between occupational clusters and allergic rhinitis in the Korean population: analysis of the Korean National Health and Nutrition Examination Survey data
    Sungjin Park, Pil Kyun Jung, Myungsup Choi, Hongdeok Seok, Hansol Kim, Sung-Soo Oh, Sang-Baek Koh
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    Jin-Ha YOON, Mo-Yeol KANG, Dayee JEUNG, Sei-Jin CHANG
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    Hongdeok Seok, Jin-Ha Yoon, Jaehoon Roh, Jihyun Kim, Yeong-Kwang Kim, Wanhyung Lee, Jeongbae Rhie, Jong-Uk Won
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    Hongdeok Seok, Sung Jae Choi, Jin-Ha Yoon, Gwan Gyu Song, Jong-Uk Won, Jae-Hoon Kim, Jaehoon Roh, Jae Hyun Jung, Mikko Juhani Lammi
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Research Article
Blood lead levels of Korean lead workers in 2003–2011
Ji-Hye Kim, Eun-A Kim, Dong-Hee Koh, Kiwhan Byun, Hyang-Woo Ryu, Sang-Gil Lee
Ann Occup Environ Med 2014;26:30.   Published online October 1, 2014
DOI: https://doi.org/10.1186/s40557-014-0030-3
AbstractAbstract PDF
Objectives

This study aimed to document the trend in blood lead levels in Korean lead workers from 2003 until 2011 and blood lead levels within each of the main industries.

Methods

Nine years (2003–2011) of blood lead level data measured during a special health examination of Korean lead workers and collected by the Korea Occupational Safety and Health Agency were analyzed. Blood lead levels were determined by year, and a geometric mean (GM) was calculated for each industry division.

Results

The overall GM blood lead level for all years combined (n = 365,331) was 4.35 μg/dL. The GM blood lead level decreased from 5.89 μg/dL in 2003 to 3.53 μg/dL in 2011. The proportion of the results ≥30 μg/dL decreased from 4.3% in 2003 to 0.8% in 2011. In the “Manufacture of Electrical Equipment” division, the GM blood lead level was 7.80 μg/dL, which was the highest among the industry divisions. The GM blood lead levels were 7.35 μg/dL and 6.77 μg/dL in the “Manufacturers of Rubber and Plastic Products” and the “Manufacture of Basic Metal Products” division, respectively.

Conclusions

The blood lead levels in Korean lead workers decreased from 2003 to 2011 and were similar to those in the US and UK. Moreover, workers in industries conventionally considered to have a high risk of lead exposure also tended to have relatively high blood lead levels compared to those in other industries.


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Case Report
Acute health effects of accidental chlorine gas exposure
Joo-An Kim, Seong-Yong Yoon, Seong-Yong Cho, Jin-Hyun Yu, Hwa-Sung Kim, Gune-Il Lim, Jin-Seok Kim
Ann Occup Environ Med 2014;26:29.   Published online October 1, 2014
DOI: https://doi.org/10.1186/s40557-014-0029-9
AbstractAbstract PDF
Objectives

This study was conducted to report the course of an accidental release of chlorine gas that occurred in a factory in Gumi-si, South Korea, on March 5, 2013. We describe the analysis results of 2 patients hospitalized because of chlorine-induced acute health problems, as well as the clinical features of 209 non-hospitalized patients.

Methods

We analyzed the medical records of the 2 hospitalized patients admitted to the hospital, as well as the medical records and self-report questionnaires of 209 non-hospitalized patients completed during outpatient treatment.

Results

Immediately after the exposure, the 2 hospitalized patients developed acute asthma-like symptoms such as cough and dyspnea, and showed restrictive and combined pattern ventilatory defects on the pulmonary function test. The case 1 showed asthma-like symptoms over six months and diurnal variability in peak expiratory flow rate was 56.7%. In case 2, his FEV1 after treatment (93%) increased by 25% compared to initial FEV1 (68%). Both cases were diagnosed as chlorine-induced reactive airways dysfunction syndrome (RADS) on the basis of these clinical features. The most frequent chief complaints of the 209 non-hospitalized patients were headache (22.7%), followed by eye irritation (18.2%), nausea (11.2%), and sore throat (10.8%), with asymptomatic patients accounting for 36.5%. The multiple-response analysis of individual symptom revealed headache (42.4%) to be the most frequent symptom, followed by eye irritation (30.5%), sore throat (30.0%), cough (29.6%), nausea (27.6%), and dizziness (27.3%).

Conclusions

The 2 patients hospitalized after exposure to chlorine gas at the leakage site showed a clinical course corresponding to RADS. All of the 209 non-hospitalized patients only complained of symptoms of the upper airways and mucous membrane irritation.


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Research Article
Vitamin D status and associated occupational factors in Korean wage workers: data from the 5th Korea national health and nutrition examination survey (KNHANES 2010–2012)
Harin Jeong, Sujin Hong, Yunjeong Heo, Hosun Chun, Daeseong Kim, Jongtae Park, Mo-yeol Kang
Ann Occup Environ Med 2014;26:28.   Published online September 16, 2014
DOI: https://doi.org/10.1186/s40557-014-0028-x
AbstractAbstract PDF
Objectives

Vitamin D deficiency is increasing worldwide. However, few studies have attempted to examine the vitamin D status of wage workers and the correlation between vitamin D deficiency and working conditions. Hence, we aimed to evaluate the prevalence of vitamin D deficiency and the association between occupational conditions and vitamin D deficiency among Korean wage workers.

Methods

Wage workers aged 20–65 years from the 5th Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012; n = 5409) were included in our analysis. We measured the prevalence of vitamin D deficiency and identified the correlations with the working conditions of these subjects.

Results

The prevalence of vitamin D deficiency in male and female subjects was 69.5% and 83.1%, respectively. Among the male subjects, a significant correlation between vitamin D deficiency and working conditions was observed among shift workers, office workers, and permanent workers. No significant correlation with any type of working conditions was observed among female subjects.

Conclusion

The prevalence of vitamin D deficiency among Korean wage workers was very high and was found to correlate significantly with working conditions, likely because of insufficient exposure to sunlight associated with certain types of work. Wage workers require more frequent outdoor activity and nutrition management to maintain sufficient vitamin D level.


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Original Article
Nailfold capillary microscopy for evaluating hand-arm vibration syndrome
Lee, Chan Boo , Sung, Joo Hyun , Park, Jung Hun , Yoo, Cheol In , Sim, Chang Sun , Oh, Ji Seon , Lee, Hun
Ann Occup Environ Med 2014;26:27.   Published online October 10, 2014
DOI: https://doi.org/10.1186/s40557-014-0027-y
AbstractAbstract PDF
OBJECTIVES
We evaluated nailfold capillary abnormalities in patients with hand-arm vibration syndrome using nailfold capillary microscopy.
METHODS
Fifty workers who underwent a special health examination because of exposure to hand-arm vibration at Ulsan University Hospital in 2012 (exposed group) and a control group of 50 white-collar employees were evaluated through a questionnaire survey regarding their present tasks, types of tools used, vibration exposure duration, use of protective wear, and medical history. Then, an occupational physician performed a physical examination for any hand deformities, skin problems, or motor and sensory dysfunctions of the upper extremities. The nailfold capillary morphologies (tortuous, crossing, bushy, meandering, branching, hemorrhage, avascular area, enlarged, and giant), capillary dimensions (afferent, top, venous, total width, and length), and specific counts (crossing and branching) on both fourth fingers were determined by a rheumatologist. Thereafter, the exposed subjects were assessed according to the Stockholm workshop classification scale. In total, 8 and 6 subjects in the exposed and control groups, respectively, were excluded from the study because of poor capillary microscopic image quality. In addition, 24 subjects in the exposed group with Stockholm vascular stage 0 were excluded. Finally, capillary morphology, dimensions, and specific counting were compared between the exposed (n = 18) and control groups (n = 44).
RESULTS
The exposed group had significantly greater crossing capillaries and abnormal capillary numbers that included crossing capillaries (crossing, branching, bushy, and meandering) but smaller branching and abnormal capillary numbers that excluded crossing capillaries (branching, bushy, and meandering) than the control group did. No significant difference in capillary dimensions was observed between the two groups. Despite the adjustment for age, smoking status, and underlying diseases, the statistical significance was unchanged. In the specific counting of the type of capillaries, the exposed group had a significantly higher total crossing count but fewer total branching count than the control group did. However, no statistical significance resulted after adjustment for age, smoking status, and underlying diseases.
CONCLUSIONS
In this study, the exposed group had significantly more crossing capillaries and a higher crossing count than the control group did.

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Research Article
Prevalence of Dry Eye Syndrome after a Three-Year Exposure to a Clean Room
Hyun A Cho, Jae Jung Cheon, Jong Seok Lee, Soo Young Kim, Seong Sil Chang
Ann Occup Environ Med 2014;26:26.   Published online September 3, 2014
DOI: https://doi.org/10.1186/s40557-014-0026-z
AbstractAbstract PDF
Objective

To measure the prevalence of dry eye syndrome (DES) among clean room (relative humidity ≤1%) workers from 2011 to 2013.

Methods

Three annual DES examinations were performed completely in 352 clean room workers aged 20–40 years who were working at a secondary battery factory. Each examination comprised the tear-film break-up test (TFBUT), Schirmer’s test I, slit-lamp microscopic examination, and McMonnies questionnaire. DES grades were measured using the Delphi approach. The annual examination results were analyzed using a general linear model and post-hoc analysis with repeated-ANOVA (Tukey). Multiple logistic regression was performed using the examination results from 2013 (dependent variable) to analyze the effect of years spent working in the clean room (independent variable).

Results

The prevalence of DES among these workers was 14.8% in 2011, 27.1% in 2012, and 32.8% in 2013. The TFBUT and McMonnies questionnaire showed that DES grades worsened over time. Multiple logistic regression analysis indicated that the odds ratio for having dry eyes was 1.130 (95% CI 1.012–1.262) according to the findings of the McMonnies questionnaire.

Conclusions

This 3-year trend suggests that the increased prevalence of DES was associated with longer working hours. To decrease the prevalence of DES, employees should be assigned reasonable working hours with shift assignments that include appropriate break times. Workers should also wear protective eyewear, subdivide their working process to minimize exposure, and utilize preservative-free eye drops.


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Research Article
Effect of Long Working Hours on Self-reported Hypertension among Middle-aged and Older Wage Workers
Dong Hyun Yoo, Mo-yeol Kang, Domyung Paek, Bokki Min, Sung-il Cho
Ann Occup Environ Med 2014;26:25.   Published online September 3, 2014
DOI: https://doi.org/10.1186/s40557-014-0025-0
AbstractAbstract PDF
Objectives

Many studies have reported an association between overwork and hypertension. However, research on the health effects of long working hours has yielded inconclusive results. The objective of this study was to identify an association between overtime work and hypertension in wage workers 45 years and over of age using prospective data.

Methods

Wage workers in Korea aged 45 years and over were selected for inclusion in this study from among 10,254 subjects from the Korean Longitudinal Study of Ageing. Workers with baseline hypertension and those with other major diseases were excluded. In the end, a total of 1,079 subjects were included. A Cox proportional hazards model was used to calculate hazard ratios and adjust for baseline characteristics such as sex, age, education, income, occupation, form of employment, body mass index, alcohol habit, smoking habit, regular exercise, and number of working days per week. Additional models were used to calculate hazard ratios after gender stratification.

Results

Among the 1,079 subjects, 85 workers were diagnosed with hypertension during 3974.2 person-months. The average number of working hours per week for all subjects was 47.68. The proportion of overtime workers was 61.0% (cutoff, 40 h per week). Compared with those working 40 h and less per week, the hazard ratio of subjects in the final model, which adjusted for all selected variables, working 41-50 h per week was 2.20 (95% confidence interval [CI], 1.19–4.06), that of subjects working 51-60 h per week was 2.40 (95% CI, 1.07–5.39), and that of subjects working 61 h and over per week was 2.87 (95% CI, 1.33–6.20). In gender stratification models, the hazard ratio of the females tended to be higher than that of the males.

Conclusion

As the number of working hours per week increased, the hazard ratio for diagnosis of hypertension significantly increased. This result suggests a positive association between overtime work and the risk of hypertension.


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Original Article
Relationship between an amount of Key Tasks and Job Satisfaction among Caregivers and Nurses in Elderly Care Facilities
Hiruta, Shuichi , Shimaoka, Midori , Tatsumi, Asami , Ono, Yuichiro , Iida, Tadayuki , Hori, Fumiko
Ann Occup Environ Med 2014;26:24.   Published online August 22, 2014
DOI: https://doi.org/10.1186/s40557-014-0024-1
AbstractAbstract PDF
OBJECTIVES
The purpose of this study is to examine relationship between an amount of key tasks and job satisfaction among caregivers and nurses in elderly care facilities.
METHODS
Questionnaires were mailed to the caring staff of elderly care facilities. After data collection (return rate 70%), information about work situations and health conditions were analyzed among 325 female workers, who were classified to 4 groups as follows; (1) caregivers under 40 years of age (2) caregivers of 40 years or over (3) nurses under 40 years of age (4) nurses of 40 years or over.
RESULTS
Mean ages and length of career in caring sector were 37.2 +/- 12.2 yr and 4.5 +/- 3.0 yr for caregivers and 41.6 +/- 9.2 yr and 16.8 +/- 8.9 yr for nurses, respectively. A larger amount of care services were done on average by workers being dissatisfied with their job than by the satisfied workers in each of the 4 groups. The dissatisfied caregivers under 40 years showed significantly higher frequencies (as ratios of 1.4 - 2 to 1) in several care services such as "helping with showers or baths", "helping with eating", "changing diapers", "moving caretakers from bed or chair to wheelchair or vice versa", as compared with the satisfied caregivers under 40 years. Similarly, the 40 plus dissatisfied caregivers helped caretakers sit up in bed significantly more frequently. For nurses, on the other hand, "changing diapers" was found as the only service with a significant difference in frequency between the dissatisfied and the satisfied, but that was limited in the 40 plus age group. A frequency of "changing diapers" was associated with an increase in the risk of job dissatisfaction.
CONCLUSIONS
These results suggested that an appropriate amount of each key task in elderly care facilities should be set to prevent staff's dissatisfaction with their job from growing excessively.

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Research Article
Relationship between Psychosocial Risk Factors and Work-Related Musculoskeletal Disorders among Public Hospital Nurses in Malaysia
Nur Azma Amin, Rusli Nordin, Quek Kia Fatt, Rahim M Noah, Jennifer Oxley
Ann Occup Environ Med 2014;26:23.   Published online August 9, 2014
DOI: https://doi.org/10.1186/s40557-014-0023-2
AbstractAbstract PDF
Objective

This study examined the relationships between psychosocial work factors and risk of WRMSDs among public hospital nurses in the Klang Valley, Malaysia.

Methods

We conducted a cross-sectional study among 660 public hospital nurses. A self-administered questionnaire was used to collect data on the occurrence of WRMSDs according to body regions, socio-demographic profiles, occupational information and psychosocial risk factors. 468 questionnaires were returned (response rate of 71%), and 376 questionnaires qualified for subsequent analysis. Univariate analyses were applied to test for mean and categorical differences across the WRMSDs; multiple logistic regression was applied to predict WRMSDs based on the Job Strain Model’s psychosocial risk factors.

Results

Over two thirds of the sample of nurses experienced discomfort or pain in at least one site of the musculoskeletal system within the last year. The neck was the most prevalent site (48.94%), followed by the feet (47.20%), the upper back (40.69%) and the lower back (35.28%). More than 50% of the nurses complained of having discomfort in region one (neck, shoulders and upperback) and region four (hips, knees, ankles, and feet). The results also revealed that psychological job demands, job strain and iso-strain ratio demonstrated statistically significant mean differences (p < 0.05) between nurses with and without WRMSDs. According to univariate logistic regression, all psychosocial risk factors illustrated significant association with the occurrence of WRMSDs in various regions of the body (OR: 1.52–2.14). Multiple logistic regression showed all psychosocial risk factors were significantly associated with WRMSDs across body regions (OR: 1.03–1.19) except for region 1 (neck, shoulders and upper back) and region 4 (hips, knees, ankles, and feet). All demographic variables except for years of employment were statistically and significantly associated with WRMSDs (p < 0.05).

Conclusions

The findings indicated the high prevalence of WRMSDs in many body regions, and the risks of developing WRMSDs according to the various body regions were associated with important psychosocial risk factors based on the job strain model. These findings have implications for the management of WRMSDs among public hospital nurses in the Klang Valley, Malaysia.


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Research Article
Musculoskeletal Disorders of the Upper Extremities Due to Extensive Usage of Hand Held Devices
Deepak Sharan, Mathankumar Mohandoss, Rameshkumar Ranganathan, Jeena Jose
Ann Occup Environ Med 2014;26:22.   Published online August 6, 2014
DOI: https://doi.org/10.1186/s40557-014-0022-3
AbstractAbstract PDF
Objective

The use of hand held devices (HHD) such as mobile phones, game controls, tablets, portable media players and personal digital assistants have increased dramatically in past decade. While sending a text message or using the controls of the HHD the users need to use their thumb and other palm muscles extensively. The objective of this study was to describe the risk factors and clinical features of the musculoskeletal disorders (MSDs) arising due to usage of hand held devices and to evaluate the effectiveness of a sequenced rehabilitation protocol.

Methods

A retrospective report analysis of 70 subjects, who were diagnosed to have a MSD affecting the upper extremities, was conducted. Medical charts from a tertiary level rehabilitation centre from 2005–2013 were analysed. All the subjects reported pain in their upper extremities following extensive usage of HHD and were examined and diagnosed to have a MSD by an orthopaedic and rehabilitation physician. After the assessment and diagnosis, all the patients underwent rehabilitation using a sequenced protocol.

Results

All the subjects reported pain in the thumb and forearm with associated burning, numbness and tingling around the thenar aspect of the hand, and stiffness of wrist and hand. 43 subjects had symptoms on the right side; 9 on left and 18 had bilateral symptoms. Correlation was found between hand dominance and MSD. 33 subjects complained of onset of symptoms following extensive text messaging. All the subjects were diagnosed to have tendinosis of Extensor Pollicis Longus and Myofascial Pain Syndrome affecting the 1st interossei, thenar group of muscles and Extensor Digitorum Communis. 23 of the subjects were senior executives, among these 7 were CEO’s of major multinational companies in India. All the subjects recovered completely following the rehabilitation.

Conclusions

The study concluded that mobile phones and gadgets that promoted the predominant usage of thumb or only one finger while texting or using the controls were associated with a higher prevalence of MSDs. Treatment using a sequenced rehabilitation protocol was found to be effective.


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Research Article
Co morbidities of Myofascial Neck Pain among Information Technology Professionals
Mathankumar Mohandoss, Deepak Sharan, Rameshkumar Ranganathan, Jeena Jose
Ann Occup Environ Med 2014;26:21.   Published online September 3, 2014
DOI: https://doi.org/10.1186/s40557-014-0021-4
AbstractAbstract PDF
Objectives

The objective of this study was to identify the musculoskeletal co-morbidities of neck pain of myofascial origin among IT professionals.

Methods

A retrospective report analysis of 5357 IT professionals from various IT companies in India was conducted. Demographic details, type and intensity of the musculoskeletal problems, employee feedbacks on status of musculoskeletal health and physician’s diagnosis were analysed. Descriptive statistics were used to describe the age, gender, body area affected and nature of work. Chi square test was used to find the association between musculoskeletal co-morbidities and myofascial neck pain (MNP).

Results

The study participants were predominantly males (71%). 41% of the population used laptops, 35% desktops and 24% both. Neck pain was the commonest reported symptom, followed by low back, shoulder and arm pain respectively. Statistical analysis also revealed that low back pain and shoulder pain, had a significant association with neck pain. Further analysis revealed that there was a significant association between the presence of MNP and thoracic outlet syndrome (p < 0.001) and fibromyalgia syndrome (p < 0.001). Other than the listed co-morbidities, eye strain was also found to be associated with MNP.

Conclusions

Low back pain and shoulder pain was found to be co morbid symptoms noted among IT professionals with MNP. Thoracic outlet syndrome and fibromyalgia were found to be the most commonly associated disorders with MNP among IT professionals.


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Research Article
Psychosocial Risk Factors and Musculoskeletal Symptoms among White and Blue-collar Workers at Private and Public Sectors
Leticia B Januario, Mariana V Batistao, Helenice JCG Coury, Ana Beatriz Oliveira, Tatiana O Sato
Ann Occup Environ Med 2014;26:20.   Published online July 25, 2014
DOI: https://doi.org/10.1186/s40557-014-0020-5
AbstractAbstract PDF
Objectives

The aim of this study was to evaluate musculoskeletal and psychosocial perception and compare these conditions regarding the type of job (white or blue-collar) and the type of management model (private or public).

Methods

Forty-seven public white-collar (PuWC), 84 private white-collar (PrWC) and 83 blue-collar workers (PrBC) were evaluated. Job Content Questionnaire (JCQ) and Utrecht Work Engagement Scale (UWES) were applied to evaluate psychosocial factors. Nordic Musculoskeletal Questionnaire (NMQ) was used to assess musculoskeletal symptoms. Pressure Pain Threshold (PPT) was measured to evaluate sensory responses.

Results

According to JCQ, all groups were classified as active profile. There was a significant association between work engagement and workers’ categories (p < 0.05). PrWC workers had the highest scores for all the UWES domains, while PrBC had the lowest ones. PPT showed that PrBC workers had an increased sensitivity for left deltoid (p < 0.01), and for both epicondyles (p < 0.01), when compared to the other groups. PrWC workers had an increased sensitivity for both epicondyles than PuWC (right p < 0.01; left, p = 0.05). There was no significant association in the report of symptoms across the groups (p > 0.05).

Conclusion

This study showed differences in psychosocial risk factors and musculoskeletal symptoms in workers engaged in different types of jobs and work organization. Personal and work-related characteristics, psychosocial factors and PPT responses were different across workers’ group. Despite all, there was no significant difference in reported symptoms across the groups, possibly indicating that the physical load is similar among the sectors.


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Review
Work-related Musculoskeletal Disorders in Korea Provoked by Workers’ Collective Compensation Claims against Work Intensification
Dongmug Kang, Youngki Kim, Young-Il Lee, Sangbaek Koh, Inah Kim, Hoonkoo Lee
Ann Occup Environ Med 2014;26:19.   Published online July 29, 2014
DOI: https://doi.org/10.1186/2052-4374-26-19
AbstractAbstract PDF

This article presents the process of workers’ problems with work related musculoskeletal disorders (WMSDs), the introduction of risk assessments (RA) for their prevention, and the consequences of this process in Korea. In 1997, economic crisis caused a rapid increase of massive layoffs, worker dispatch system introduction, job insecurity, and use of irregular workers resulting in work intensification. Work intensification increased WMSDs, which created massive workers’ compensation collective claims. Workers argued for the reduction of work intensity. The RAs introduced as a consequence of the workers’ struggle is unique in the world. Whereas these RAs were expected to play a pivotal role in WMSDs prevention, they dis not due to workers’ lack of engagement after the compensation struggle. In fact, changes in the compensation judgment system and criteria have resulted in lower compensation approval rates leading to lower workers’ compensation claims. The Korean experience provides insight into WMSDs causes in a globalized world. In such a the globalized world, work intensification as the result of work flexibility could be an international trend.


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Case Report
Design and Evaluation of Ergonomic Interventions for the Prevention of Musculoskeletal Disorders in India
Somnath Gangopadhyay, Samrat Dev
Ann Occup Environ Med 2014;26:18.   Published online July 1, 2014
DOI: https://doi.org/10.1186/2052-4374-26-18
AbstractAbstract PDF
Background

Improper workstation, work procedures and tools are found to be the risk factors for the development of musculoskeletal disorders among the informal sector workers of the developing countries. Low cost ergonomic interventions can effectively improve such adverse conditions.

Case presentation

In the present article some studies related to design interventions in different informal and agricultural sectors were discussed and their efficacies were analyzed. It was observed that with the help of appropriate interventions musculoskeletal disorders were reduced, adverse physiological conditions were improved when awkward postures were corrected and ultimately the organisational productivity was increased.

Conclusion

Proper implementation of ergonomic interventions can ultimately improve the economy of the nation.


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Research Article
Work-related Musculoskeletal Disorders in Korea and Japan: A Comparative Description
Eun-A Kim, Minori Nakata
Ann Occup Environ Med 2014;26:17.   Published online June 24, 2014
DOI: https://doi.org/10.1186/2052-4374-26-17
AbstractAbstract PDF
Objectives

Work related Musculoskeletal disorders (WMSD) is one of the most important problem in occupational health system of Korea and Japan, where the OHS system developed in similar socio-cultural environment. This study compared WMSD in Korea and Japan to review similarities and differences in their historical background, and development of prevention policies.

Methods

Scientific articles, government reports, and related official and non-official statistics on WMSD since the 1960s in Japan and Korea were reviewed.

Results

The historical background and basic structure of the compensation system in Korea and Japan largely overlapped. The issuing of WMSD in both countries appeared as upper limb disorder (ULD), named occupational cervicobrachial diseases (OCD) in Japan, and neck-shoulder-arm syndrome (NSA) 30 years later in Korea, following the change from an industrial structure to automated office work. Both countries developed manuals for diagnosis, guidelines for workplace management, and prevention policies. At present, compensation cases per covered insurers for WMSD are higher in Korea than in Japan, due to the social welfare system and cultural environment. Prevention policies in Korea are enforced more strongly with punitive measures than in Japan. In contrast, the Japanese system requires autonomous effort toward risk control and management, focusing on specific risky processes.

Conclusions

WMSD in Korea and Japan have a similar history of identification and compensation structure, yet different compensation proportions per covered insurer and prevention policies. Follow-up study with international cooperation is necessary to improve both systems.


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Review
An Evidence-Based Multidisciplinary Practice Guideline to Reduce the Workload due to Lifting for Preventing Work-Related Low Back Pain
P Paul FM Kuijer, Jos HAM Verbeek, Bart Visser, Leo AM Elders, Nico Van Roden, Marion ER Van den Wittenboer, Marian Lebbink, Alex Burdorf, Carel TJ Hulshof
Ann Occup Environ Med 2014;26:16.   Published online June 24, 2014
DOI: https://doi.org/10.1186/2052-4374-26-16
AbstractAbstract PDF

We developed an evidence-based practice guideline to support occupational safety and health (OSH) professionals in assessing the risk due to lifting and in selecting effective preventive measures for low back pain (LBP) in the Netherlands. The guideline was developed at the request of the Dutch government by a project team of experts and OSH professionals in lifting and work-related LBP. The recommendations for risk assessment were based on the quality of instruments to assess the risk on LBP due to lifting. Recommendations for interventions were based on a systematic review of the effects of worker- and work directed interventions to reduce back load due to lifting. The quality of the evidence was rated as strong (A), moderate (B), limited (C) or based on consensus (D). Finally, eight experts and twenty-four OSH professionals commented on and evaluated the content and the feasibility of the preliminary guideline. For risk assessment we recommend loads heavier than 25 kg always to be considered a risk for LBP while loads less than 3 kg do not pose a risk. For loads between 3–25 kg, risk assessment shall be performed using the Manual handling Assessment Charts (MAC)-Tool or National Institute for Occupational Safety and Health (NIOSH) lifting equation. Effective work oriented interventions are patient lifting devices (Level A) and lifting devices for goods (Level C), optimizing working height (Level A) and reducing load mass (Level C). Ineffective work oriented preventive measures are regulations to ban lifting without proper alternatives (Level D). We do not recommend worker-oriented interventions but consider personal lift assist devices as promising (Level C). Ineffective worker-oriented preventive measures are training in lifting technique (Level A), use of back-belts (Level A) and pre-employment medical examinations (Level A). This multidisciplinary evidence-based practice guideline gives clear criteria whether an employee is at risk for LBP while lifting and provides an easy-reference for (in)effective risk reduction measures based on scientific evidence, experience, and consensus among OSH experts and practitioners.


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Research Article
Automation of Workplace Lifting Hazard Assessment for Musculoskeletal Injury Prevention
June T Spector, Max Lieblich, Stephen Bao, Kevin McQuade, Margaret Hughes
Ann Occup Environ Med 2014;26:15.   Published online June 24, 2014
DOI: https://doi.org/10.1186/2052-4374-26-15
AbstractAbstract PDF
Objectives

Existing methods for practically evaluating musculoskeletal exposures such as posture and repetition in workplace settings have limitations. We aimed to automate the estimation of parameters in the revised United States National Institute for Occupational Safety and Health (NIOSH) lifting equation, a standard manual observational tool used to evaluate back injury risk related to lifting in workplace settings, using depth camera (Microsoft Kinect) and skeleton algorithm technology.

Methods

A large dataset (approximately 22,000 frames, derived from six subjects) of simultaneous lifting and other motions recorded in a laboratory setting using the Kinect (Microsoft Corporation, Redmond, Washington, United States) and a standard optical motion capture system (Qualysis, Qualysis Motion Capture Systems, Qualysis AB, Sweden) was assembled. Error-correction regression models were developed to improve the accuracy of NIOSH lifting equation parameters estimated from the Kinect skeleton. Kinect-Qualysis errors were modelled using gradient boosted regression trees with a Huber loss function. Models were trained on data from all but one subject and tested on the excluded subject. Finally, models were tested on three lifting trials performed by subjects not involved in the generation of the model-building dataset.

Results

Error-correction appears to produce estimates for NIOSH lifting equation parameters that are more accurate than those derived from the Microsoft Kinect algorithm alone. Our error-correction models substantially decreased the variance of parameter errors. In general, the Kinect underestimated parameters, and modelling reduced this bias, particularly for more biased estimates. Use of the raw Kinect skeleton model tended to result in falsely high safe recommended weight limits of loads, whereas error-corrected models gave more conservative, protective estimates.

Conclusions

Our results suggest that it may be possible to produce reasonable estimates of posture and temporal elements of tasks such as task frequency in an automated fashion, although these findings should be confirmed in a larger study. Further work is needed to incorporate force assessments and address workplace feasibility challenges. We anticipate that this approach could ultimately be used to perform large-scale musculoskeletal exposure assessment not only for research but also to provide real-time feedback to workers and employers during work method improvement activities and employee training.


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Editorial
Prevention of Work-Related Musculoskeletal Disorders
Dongmug Kang, Young-Ki Kim, Eun-A Kim, Dae Hwan Kim, Inah Kim, Hyoung-Ryoul Kim, Kyoung-Bok Min, Kyunghee Jung-Choi, Sung-Soo Oh, Sang-Baek Koh
Ann Occup Environ Med 2014;26:14.   Published online June 24, 2014
DOI: https://doi.org/10.1186/2052-4374-26-14
PDF

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Research Article
The Effect of Work Characteristics on Dermatologic Symptoms in Hairdressers
Pil Kyun Jung, June-Hee Lee, Ji Hye Baek, Jungho Hwang, Jong-Uk Won, Inah Kim, Jaehoon Roh
Ann Occup Environ Med 2014;26:13.   Published online June 9, 2014
DOI: https://doi.org/10.1186/2052-4374-26-13
AbstractAbstract PDF
Objectives

Hairdressers in Korea perform various tasks and are exposed to health risk factors such as chemical substances or prolonged duration of wet work. The objective of this study is to provide descriptive statistics on the demographics and work characteristics of hairdressers in Korea and to identify work-related risk factors for dermatologic symptoms in hairdressers.

Methods

1,054 hairdressers were selected and analyzed for this study. Independent variables were exposure to chemical substances, the training status of the hairdressers, and the main tasks required of them, and the dependent variable was the incidence of dermatologic symptoms. The relationships between work characteristics and dermatologic symptoms were evaluated by estimating odds ratios using multiple logistic regression analysis.

Results

Among the 1,054 study subjects, 212 hairdressers (20.1%) complained of dermatologic symptoms, and the symptoms were more prevalent in younger, unmarried or highly educated hairdressers. The main tasks that comprise the majority of the wet work were strictly determined by training status, since 96.5% of staff hairdressers identified washing as their main task, while only 1.5% and 2.0% of master and designer hairdressers, respectively, identified this as their main task. Multiple logistic regressions was performed to estimate odds ratios. While exposure to hairdressing chemicals showed no significant effect on the odds ratio for the incidence of dermatologic symptoms, higher odds ratios of dermatologic symptoms were shown in staff hairdressers (2.70, 95% CI: 1.32 - 5.51) and in hairdressers who perform washing as their main task (2.03, 95% CI: 1.22 - 3.37), after adjusting for general and work characteristics.

Conclusions

This study showed that the training status and main tasks of hairdressers are closely related to each other and that the training status and main tasks of hairdressers are related to the incidence of dermatologic symptoms. This suggests that in the future, regulations on working conditions and health management guidelines for hairdressers should be established.


Citations

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  • Incidence and prevalence of occupational contact dermatitis in hairdressing apprentices: A 3‐year prospective cohort study
    Zrinka Franić, Suzana Ljubojević Hadžavdić, Željka Babić, Jelena Macan
    Contact Dermatitis.2023; 89(3): 153.     CrossRef
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    Aulia Rana Haerani, Kartini Kartini
    ULIL ALBAB : Jurnal Ilmiah Multidisiplin.2023; 2(9): 4562.     CrossRef
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    Gitte Jacobsen, Kurt Rasmussen, Anne Bregnhøj, Marléne Isaksson, Thomas L. Diepgen, Ole Carstensen
    International Archives of Occupational and Environmental Health.2022; 95(1): 35.     CrossRef
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    Mohammad Hajaghazadeh, Abbas Jafari, Shole Jafari, Shirin Hekmatirad, Alireza Didarloo
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    Dohyung Kim, Mo-Yeol Kang, Sungyeul Choi, Jaechan Park, Hye-Ji Lee, Eun-A. Kim
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Review
The Relationship between the Occupational Exposure of Trichloroethylene and Kidney Cancer
Inah Kim, Jaehyeok Ha, June-Hee Lee, Kye-mook Yoo, Jaehoon Rho
Ann Occup Environ Med 2014;26:12.   Published online June 3, 2014
DOI: https://doi.org/10.1186/2052-4374-26-12
AbstractAbstract PDF

Trichloroethylene (TCE) has been widely used as a degreasing agent in many manufacturing industries. Recently, the International Agency for Research on Cancer presented “sufficient evidence” for the causal relationship between TCE and kidney cancer. The aim of this study was to review the epidemiologic evidences regarding the relationship between TCE exposure and kidney cancer in Korean work environments. The results from the cohort studies were inconsistent, but according to the meta-analysis and case–control studies, an increased risk for kidney cancer was present in the exposure group and the dose–response relationship could be identified using various measures of exposure. In Korea, TCE is a commonly used chemical for cleaning or degreasing processes by various manufacturers; average exposure levels of TCE vary widely. When occupational physicians evaluate work-relatedness kidney cancers, they must consider past exposure levels, which could be very high (>100 ppm in some cases) and associated with jobs, such as plating, cleaning, or degreasing. The exposure levels at a manual job could be higher than an automated job. The peak level of TCE could also be considered an important exposure-related variable due to the possibility of carcinogenesis associated with high TCE doses. This review could be a comprehensive reference for assessing work-related TCE exposure and kidney cancer in Korea.


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Research Article
Factors Related to Sleep Disorders among Male Firefighters
Dong-Kyun Lim, Ki-Ook Baek, In-Sung Chung, Mi-Young Lee
Ann Occup Environ Med 2014;26:11.   Published online May 22, 2014
DOI: https://doi.org/10.1186/2052-4374-26-11
AbstractAbstract PDF
Objectives

The aim of this study was to investigate factors associated with sleep disorders in male firefighters working in a metropolitan city in South Korea.

Methods

Self-administered questionnaires including the Nordic Musculoskeletal Questionnaire, Korean Occupational Stress Scale-Short Form, Psychosocial Well-Being Index-Short Form, Pittsburg Sleep Quality Index, and Beck-Depression Inventory-2 as well as surveys collecting socio-demographic characteristics and work-related factors were given to 730 male firefighters. After exclusion for missing data, 657 male firefighters were included, and logistic regression analysis adjusted for the work-related factors, psychosocial factors, and general risk factors were used to assess the relationship between sleep disorders and associated factors.

Results

The prevalence of sleep disorders was 48.7%. Shift work (adjusted OR 1.58, 95% CI = 1.02-2.45), musculoskeletal symptoms (adjusted OR 2.89, 95% CI = 2.02-4.14), and depression (adjusted OR 7.04 95% CI = 4.03-12.30) were associated with sleep disorders.

Conclusions

Musculoskeletal symptoms, shift work, and depression are associated with sleep disorders. Integrated health management is needed to promote good sleep quality among firefighters.


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  • 58 Web of Science
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Case Report
A Case of Complicated Silicosis with a Complex Clinical Course in a Glass Manufacturing Worker
Hee-Seok Yang, Jung-Il Kim, Byeong-Jin Ye, Tae-Jun Yoo, Sun-Woo Lee, Kap-Yeol Jung
Ann Occup Environ Med 2014;26:10.   Published online May 15, 2014
DOI: https://doi.org/10.1186/2052-4374-26-10
AbstractAbstract PDF

We reported a case of complicated silicosis that occurred in a glass manufacturing plant worker who had presumably been exposed to low-concentration free silica for almost 20 years. To the best of our knowledge this report is the first in the Republic of Korea. The physician’s first impression was cancer since the enlargement of neck and supraclavicuar lymph nodes had clearly progressed and metastasis was suspected in ultrasonography. However, it turned out to be reactive hyperplasia and anthracosis. Although lung cancer was suspected and tests were performed in 2 hospitals due to repetitive cough and dyspnea, along with weight loss of approximately 10% over the course of 7 months, the patient was eventually diagnosed with complicated silicosis and pneumothorax occurred after 1 year. Herein, we report this case with a literature review.


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Research Article
Pulmonary function decline in firefighters and non-firefighters in South Korea
Ju-Hwan Choi, Jae-Hong Shin, Mi-Young Lee, In-Sung Chung
Ann Occup Environ Med 2014;26:9.   Published online April 25, 2014
DOI: https://doi.org/10.1186/2052-4374-26-9
AbstractAbstract PDF
Objectives

The purpose of this study was to evaluate and compare changes to pulmonary function among firefighters and non-firefighters who were exposed to harmful substances in their work environments.

Methods

Firefighters (n = 322) and non-firefighters (n = 107) in Daegu who received a pulmonary function test in 2008 and 2011 as well as a regular health examination were included. Repeated measures ANOVA was performed to evaluate the pulmonary function of the two groups over the three-year period.

Results

After adjusting for age, height, body mass index, duration of exposure, physical activity, and smoking, which were statistically different between the two groups and known risk factors of pulmonary function, the forced expiratory volume in one s FEV1, forced vital capacity FVC, and FEV1/FVC% over the 3 year period were significantly lower among firefighters compared with non-firefighters.

Conclusions

Evaluating the working environment of firefighters is difficult; however, our study revealed that pulmonary function declined in firefighters. Thus, more effort should be made to prevent and manage respiratory diseases early by preforming strict and consistent pulmonary function tests in firefighters.


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  • İtfaiyecilerin Meslekte Geçirdikleri Aktif Dönem Uzunluğunun Solunum Fonksiyonları ve Merdiven Tırmanma Performansına Etkisinin İncelenmesi
    Betül Ayten Karaman, Sena Arıcan, Hatice Kübra Kürk, Buse Baş, Fulya Senem Karaahmetoğlu, Halit Çınarka, Esra Pehlivan
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    Frontiers in Public Health.2023;[Epub]     CrossRef
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  • Airspace Dimension Assessment for early detection of lung function impairment in the peripheral airways of firefighters
    Marta A. Kisiel, Gui-Hong Cai, Madeleine Petersson Sjögren, Jakob Löndahl, Jonas Jakobsson, Per Wollmer, Andrei Malinovschi, Magnus Svartengren
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Research Article
Estimated rate of agricultural injury: the Korean Farmers’ Occupational Disease and Injury Survey
Hyeseon Chae, Kyungdoo Min, kanwoo Youn, Jinwoo Park, Kyungran Kim, Hyocher Kim, Kyungsuk Lee
Ann Occup Environ Med 2014;26:8.   Published online April 25, 2014
DOI: https://doi.org/10.1186/2052-4374-26-8
AbstractAbstract PDF
Objectives

This study estimated the rate of agricultural injury using a nationwide survey and identified factors associated with these injuries.

Methods

The first Korean Farmers’ Occupational Disease and Injury Survey (KFODIS) was conducted by the Rural Development Administration in 2009. Data from 9,630 adults were collected through a household survey about agricultural injuries suffered in 2008. We estimated the injury rates among those whose injury required an absence of more than 4 days. Logistic regression was performed to identify the relationship between the prevalence of agricultural injuries and the general characteristics of the study population.

Results

We estimated that 3.2% (±0.00) of Korean farmers suffered agricultural injuries that required an absence of more than 4 days. The injury rates among orchard farmers (5.4 ± 0.00) were higher those of all non-orchard farmers. The odds ratio (OR) for agricultural injuries was significantly lower in females (OR: 0.45, 95% CI = 0.45–0.45) compared to males. However, the odds of injury among farmers aged 50–59 (OR: 1.53, 95% CI = 1.46–1.60), 60–69 (OR: 1.45, 95% CI = 1.39–1.51), and ≥70 (OR: 1.94, 95% CI = 1.86–2.02) were significantly higher compared to those younger than 50. In addition, the total number of years farmed, average number of months per year of farming, and average hours per day of farming were significantly associated with agricultural injuries.

Conclusions

Agricultural injury rates in this study were higher than rates reported by the existing compensation insurance data. Males and older farmers were at a greater risk of agriculture injuries; therefore, the prevention and management of agricultural injuries in this population is required.


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Case Report
A Case of Obstructive Sleep Apnea and Assessments of Fitness for Work
Sukwoo Hong, Yewon Kim, Ji-Young Ryu, Sangyoon Lee, Byung-Chul Son, Chae-Kwan Lee, Dae-Hwan Kim
Ann Occup Environ Med 2014;26:7.   Published online April 25, 2014
DOI: https://doi.org/10.1186/2052-4374-26-7
AbstractAbstract PDF
Background

Obstructive sleep apnea is a common sleep disorder that can cause excessive daytime sleepiness and impairment of cognition. These symptoms may lead to the occurrence of occupational accidents in workers with obstructive sleep apnea.

Case presentation

A 36-year-old man who worked as a dimensional control surveyor caused a vehicle accident while he was driving at the work site. Although he experienced loss of consciousness at the time of the accident, he had no other symptoms. His brain computed tomography and laboratory test did not show any specific findings. Medical tests were conducted to evaluate his fitness for work. Decreased sleep latency was observed on the electroencephalography image, which is suggestive of a sleep disorder. He frequently experienced daytime sleepiness and his Epworth sleepiness score was 13. The polysomnography showed a markedly increased apnea-hypopnea index of 84.3, which led to a diagnosis of severe obstructive sleep apnea. The patient was advised to return to work only when his obstructive sleep apnea improved through proper treatment.

Conclusion

Proper screening for obstructive sleep apnea among workers is important for preventing workplace accidents caused by this disorder, but screening guidelines have not yet been established in Korea. An effort toward preparing practical guidelines for obstructive sleep apnea is needed.


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  • Effects of exercise training on brain metabolism and cognitive functioning in sleep apnea
    Linda M. Ueno-Pardi, Fabio L. Souza-Duran, Larissa Matheus, Amanda G. Rodrigues, Eline R. F. Barbosa, Paulo J. Cunha, Camila G. Carneiro, Naomi A. Costa, Carla R. Ono, Carlos A. Buchpiguel, Carlos E. Negrão, Geraldo Lorenzi-Filho, Geraldo Busatto-Filho
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Research Article
Association among Working Hours, Occupational Stress, and Presenteeism among Wage Workers: Results from the Second Korean Working Conditions Survey
Sung-Hwan Jeon, Jong-Han Leem, Shin-Goo Park, Yong-Seok Heo, Bum-Joon Lee, So-Hyun Moon, Dal-Young Jung, Hwan-Cheol Kim
Ann Occup Environ Med 2014;26:6.   Published online March 24, 2014
DOI: https://doi.org/10.1186/2052-4374-26-6
AbstractAbstract PDF
Objectives

The purpose of the present study was to identify the association between presenteeism and long working hours, shiftwork, and occupational stress using representative national survey data on Korean workers.

Methods

We analyzed data from the second Korean Working Conditions Survey (KWCS), which was conducted in 2010, in which a total of 6,220 wage workers were analyzed. The study population included the economically active population aged above 15 years, and living in the Republic of Korea. We used the chi-squared test and multivariate logistic regression to test the statistical association between presenteeism and working hours, shiftwork, and occupational stress.

Results

Approximately 19% of the workers experienced presenteeism during the previous 12 months. Women had higher rates of presenteeism than men. We found a statistically significant dose–response relationship between working hours and presenteeism. Shift workers had a slightly higher rate of presenteeism than non-shift workers, but the difference was not statistically significant. Occupational stress, such as high job demand, lack of rewards, and inadequate social support, had a significant association with presenteeism.

Conclusions

The present study suggests that long working hours and occupational stress are significantly related to presenteeism.


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Review
Very Long (> 48 hours) Shifts and Cardiovascular Strain in Firefighters: a Theoretical Framework
BongKyoo Choi, Peter L Schnall, Marnie Dobson, Javier Garcia-Rivas, HyoungRyoul Kim, Frank Zaldivar, Leslie Israel, Dean Baker
Ann Occup Environ Med 2014;26:5.   Published online March 6, 2014
DOI: https://doi.org/10.1186/2052-4374-26-5
AbstractAbstract PDF

Shift work and overtime have been implicated as important work-related risk factors for cardiovascular disease (CVD). Many firefighters who contractually work on a 24-hr work schedule, often do overtime (additional 24-hr shifts) which can result in working multiple, consecutive 24-hr shifts. Very little research has been conducted on firefighters at work that examines the impact of performing consecutive 24-hr shifts on cardiovascular physiology. Also, there have been no standard field methods for assessing in firefighters the cardiovascular changes that result from 24-hr shifts, what we call “cardiovascular strain”. The objective of this study, as the first step toward elucidating the role of very long (> 48 hrs) shifts in the development of CVD in firefighters, is to develop and describe a theoretical framework for studying cardiovascular strain in firefighters on very long shifts (i.e., > 2 consecutive 24-hr shifts). The developed theoretical framework was built on an extensive literature review, our recently completed studies with firefighters in Southern California, e-mail and discussions with several firefighters on their experiences of consecutive shifts, and our recently conducted feasibility study in a small group of firefighters of several ambulatory cardiovascular strain biomarkers (heart rate, heart rate variability, blood pressure, salivary cortisol, and salivary C-reactive protein). The theoretical framework developed in this study will facilitate future field studies on consecutive 24-hr shifts and cardiovascular health in firefighters. Also it will increase our understanding of the mechanisms by which shift work or long work hours can affect CVD, particularly through CVD biological risk factors, and thereby inform policy about sustainable work and rest schedules for firefighters.


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Research Article
Effectiveness of a Comprehensive Stress Management Program to Reduce Work-Related Stress in a Medium-Sized Enterprise
Shin-Ae Kim, Chunhui Suh, Mi-Hee Park, Kunhyung Kim, Chae-Kwan Lee, Byung-Chul Son, Jeong-Ho Kim, Jong-Tae Lee, Kuck-Hyun Woo, Kabsoon Kang, Hyunjin Jung
Ann Occup Environ Med 2014;26:4.   Published online February 13, 2014
DOI: https://doi.org/10.1186/2052-4374-26-4
AbstractAbstract PDF
Objectives

To assess the effectiveness of a comprehensive workplace stress management program consisting of participatory action-oriented training (PAOT) and individual management.

Methods

A comprehensive workplace stress management program was conducted in a medium-sized enterprise. The baseline survey was conducted in September 2011, using the Korean Occupational Stress Scale (KOSS) and Worker’s Stress Response Inventory (WSRI). After implementing both organizational and individual level interventions, the follow up evaluation was conducted in November 2011.

Results

Most of the workers participated in the organizational level PAOT and made Team-based improvement plans. Based on the stress survey, 24 workers were interviewed by a researcher. After the organizational and individual level interventions, there was a reduction of several adverse psychosocial factors and stress responses. In the case of blue-collar workers, psychosocial factors such as the physical environment, job demands, organizational system, lack of rewards, and occupational climate were significantly improved; in the case of white-collar workers, the occupational climate was improved.

Conclusions

In light of these results, we concluded that the comprehensive stress management program was effective in reducing work-related stress in a short-term period. A persistent long-term follow up is necessary to determine whether the observed effects are maintained over time. Both team-based improvement activities and individual interviews have to be sustainable and complementary to each other under the long-term plan.


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Research Article
Iron Deficiency is Not Associated with Increased Blood Cadmium in Infants
Jung-Hun Park, Sangkyu Park, Yangho Kim
Ann Occup Environ Med 2014;26:3.   Published online February 10, 2014
DOI: https://doi.org/10.1186/2052-4374-26-3
AbstractAbstract PDF
Objectives

To determine whether blood cadmium concentration is elevated in iron-deficient infants.

Methods

Blood cadmium and serum ferritin concentrations, serum iron/total iron-binding capacity (Fe/TIBC) and complete blood counts were measured in 31 iron deficient and 36 control infants, aged 6–24 months. All 31 iron-deficient infants received iron supplementation for 1–6 months.

Results

Blood cadmium concentrations were measured again in 19 of the iron deficient infants after their ferritin levels returned to the normal range. The mean blood cadmium concentration did not differ significantly in iron deficient and control infants. The mean blood cadmium concentration in the 19 iron-deficient infants was not significantly altered by ferric hydroxide treatment, while their hemoglobin, ferritin, and Fe/TIBC (%) concentrations were significantly higher after than before treatment.

Conclusion

These findings indicate that iron deficiency does not increase blood cadmium concentrations in infants, in contrast with the effects of iron deficiency on manganese and lead concentrations.


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Research Article
The Association between Long Working Hours and Self-Rated Health
Jun-Taek Song, Goeun Lee, Jongho Kwon, Jung-Woo Park, Hyunrim Choi, Sinye Lim
Ann Occup Environ Med 2014;26:2.   Published online January 20, 2014
DOI: https://doi.org/10.1186/2052-4374-26-2
AbstractAbstract PDF
Objectives

This study was conducted to determine the number of hours worked per week by full-time wage workers by using the data of the Korean Labor and Income Panel Study (KLIPS), which represents the domestic urban area household, and to determine the association between weekly working hours and the level of self-rated health.

Methods

We used data from the 11th KLIPS conducted in 2008. The subjects of this study were 3,699 full-time wage workers between the ages of 25 and 64 years. The association between weekly working hours and self-rated health was analyzed considering socio-demographic characteristics, work environment, and health-related behaviors.

Results

Among the workers, 29.7% worked less than 40 hours per week; 39.7%, more than 40 to 52 hours; 19.7%, more than 52 to 60 hours; and 10.9%, more than 60 hours per week. After controlling for socio-demographic variables, work environment-related variables, and health-related behavior variables, the odds ratio (OR) for poor self-rated health for the group working more than 40 hours and up to 52 hours was calculated to be 1.06 (95% confidence interval (CI), 0.89-1.27) when the group working less than 40 hours per week was considered the reference. The OR for the group working more than 60 hours was 1.42 (95% CI, 1.10-1.83) and that for the group working more than 52 hours and up to 60 hours was 1.07 (95% CI, 0.86-1.33). After stratification by gender and tenure, the OR of the female workers group and that of the group with a tenure of more than 1 year were found to be significantly higher than those of the other groups.

Conclusions

This study showed that workers working more than 60 hours per week have a significantly higher risk of poor self-rated health than workers working less than 40 hours per week. This effect was more obvious for the female workers group and the group with a tenure of more than 1 year. In the future, longitudinal studies may be needed to determine the association between long working hours and various health effects in Korean workers.


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Research Article
The Relationship between Injury and Socioeconomic Status in Reference to the Fourth Korean National Health and Nutrition Examination Survey
Sung-Kyung Kim, Hyocher Kim, Kyungsuk Lee, Hee-Tae Kang, Sung-Soo Oh, Sang Baek Ko
Ann Occup Environ Med 2014;26:1.   Published online January 3, 2014
DOI: https://doi.org/10.1186/2052-4374-26-1
AbstractAbstract PDF
Objectives

This study aims to investigate the relationship between the total injury experience rate and socioeconomic status based on the fourth Korea National Health and Nutrition Examination Survey (KNHANES).

Methods

By analyzing data from the fourth KNHANES conducted from 2007 to 2009, we estimated the injury experience rate according to socioeconomic status, including the occupational characteristics of 11,837 subjects. Setting the injury experience rate as a dependent variable and socioeconomic status as an independent variable, we performed logistic regression to calculate odds ratios reflecting the likelihood of injury according to socioeconomic status while controlling for relevant covariates.

Results

In 797 subjects who had injury experience over the past 1 year, 290 persons (36.4%) had a work-related injury. As their income, home value, and educational status increased, their injury experiences decreased. Among occupational groups, the craft, equipment, machine operating, and assembling workers showed the highest rate (10.6%) of injury experience, and the lowest rate (5.7%) was found in the unemployed group. After adjusting for the confounding variables, the experience of injury was significantly related to several socioeconomic factors: high income (OR = 0.54; 95% CI: 0.34-0.86), high home value (OR = 0.65; 95% CI: 0.43-0.96), low education status (OR = 1.28; 95% CI: 1.07-1.52), and specific occupations such as craft, equipment, machine operating, and assembling work (OR = 1.99; 95% CI: 1.60-2.47), skilled agriculture, forestry and fishery work (OR = 1.43; 95% CI: 1.02-2.01), and simple labor (OR = 1.38; 95% CI: 1.04-1.82).

Conclusions

The injury experience rate differed depending on the socioeconomic status. A negative correlation was found between the injury experience rate and income, low home value, and education level. Moreover, a higher rate of injury experience was found in occupation groups and physical worker groups in comparison to the unemployed group and white-collar worker groups. This study would be useful in selecting appropriate priorities for injury management in Korea.


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