Annals of Occupational and Environmental Medicine

Research Article

A study of job stress, suicidal ideation and suicide attempts in display manufacturing workers: a cross-sectional study: Seung-hwan Ahn, Yong-Jin Lee, Eun-Chul Jang, Soon-Chan Kwon, Young-Sun Min, Seung-Hoon Ryu; Ann Occup Environ Med 2020;32:e16. Published online June 2, 2020; DOI: https://doi.org/10.35371/aoem.2020.32.e16

Background

This study aimed to investigate the association between job stress and suicide ideation/attempts among display manufacturing workers.

Methods

Data were collected from 836 workers in a display manufacturing company who participated in health screenings from May 22 to June 16, 2017. The data included general characteristics, night work, job tenure, previous physician-diagnosed chronic diseases, suicidal ideation/suicide attempts, and job stress. We investigated suicidal ideation/suicide attempts that covered the past year by using a self-reported questionnaire. Job stress was measured using the 43-item Korean Occupational Stress Scale. Multiple logistic regression analysis was used to investigate the association between job stress and suicidal ideation/suicide attempts. The mediator effect of depression on suicidal ideation/suicide attempts was tested using a series of logistic regression by applying Baron and Kenny's mediation method.

Results

In the model adjusting for variables (e.g., age, body mass index, smoking, alcohol consumption, regular exercise, shift work, job tenure, chronic disease and depression), physical environment (OR: 3.60, 95% CI: 1.08–12.02), lack of reward (OR: 5.31, 95% CI: 1.54–18.34), and occupation climate (OR: 7.36, 95% CI: 2.28–23.72) were correlated with suicidal ideation/suicide attempts in women. However, all subscales of job stress were not significantly correlated with suicidal ideation/suicide attempts in men. In mediation analysis, job instability and occupational climate were correlated with suicidal ideation/suicide attempts and were mediated by depression in men workers.

Conclusions

In women workers, the experiences of suicidal ideation/suicide attempts were significantly correlated with the physical environment, lack of reward, and occupational climate that were subscales of job stress. In men workers, depression rather than job stress was correlated with experiences of suicidal ideation/suicide attempts.

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Relationship between job stress and impaired fasting glucose in male steel industry workers: a cross-sectional study
Hyun-Kyo Lee, Inho Lee, Jisuk Yun, Yong-Jin Lee, Eun-Chul Jang, Young-Sun Min, Soon-Chan Kwon
Annals of Occupational and Environmental Medicine.2023;[Epub] CrossRef
General work stress and suicide cognitions in health-care workers: mediating effect of hopelessness and job satisfaction
Abdulselami Sarigül, Alican Kaya, Izaddin Ahmad Aziz, Murat Yıldırım, Halil Ibrahim Özok, Francesco Chirico, Salvatore Zaffina
Frontiers in Public Health.2023;[Epub] CrossRef
Overview of the suicidal phenomenon in twenty-years autopsies at the Legal Medicine Unit of Pavia
G. Belli, V. Bolcato, J. Quaiotti, D. Cassinari, L. Tarchi, L. Tronconi, S. Damiani, N. Brondino, P. Politi, M. Moretti
Ethics, Medicine and Public Health.2022; 21: 100756. CrossRef

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Research Article

Relationship between job stress and functional dyspepsia in display manufacturing sector workers: a cross-sectional study: Younghyeon Nam, Soon-Chan Kwon, Yong-Jin Lee, Eun-Chul Jang, Seung-hwan Ahn; Ann Occup Environ Med 2018;30:62. Published online October 19, 2018; DOI: https://doi.org/10.1186/s40557-018-0274-4

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Background

Job stress has been reported as a risk factor of psychological changes, which have been shown to be related to gastrointestinal diseases and symptoms such as functional dyspepsia. However, few studies have assessed the relationship between job stress and functional dyspepsia. Therefore, we investigated the relationship between job stress and functional dyspepsia in South Korea.

Methods

This study was conducted between May 23 and July 6, 2016 and included 901 workers in the display manufacturing sector. Subjects completed self-reported questionnaires, regarding Korean Occupational Stress Scale (KOSS), functional dyspepsia, Insomnia Severity Index-K, and health-related behaviors and job characteristics. Subjects were divided into functional dyspepsia-positive and -negative groups based on the Rome III criteria. The KOSS high-risk group was defined as subjects with KOSS score above the 75 percentile of KOSS reference value. Multiple logistic regression analysis was performed to investigate the association between job stress and functional dyspepsia.

Results

In women, the risk of functional dyspepsia was significantly higher in the high-risk groups of the following KOSS subcategories in unadjusted model: job demand (OR 3.282, 95% CI 1.181–9.126), and occupational climate (OR 2.665, 95% CI 1.041–6.823). Even in adjusted model, the risk was significantly higher in the high-risk groups of the following KOSS subcategories: job demand (OR 3.123, 95% CI 1.036–9.416) and occupational climate (OR 3.304, 95% CI 1.198–9.115). In men, the risk of functional dyspepsia was not significant in all KOSS subcategories.

Conclusions

This study showed that job demand and occupational climates were associated with functional dyspepsia in female display manufacturing sector workers. Therefore, both clinical and mental health approaches should be used in the management of functional dyspepsia in women.

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Influence of work-related stress on patient safety culture among nurses in a tertiary hospital: a cross-sectional study
Mohammed Mohammed Sani, Yahaya Jafaru, Daniel Opotamutale Ashipala, Abubakar Kalgo Sahabi
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The Treatment of Functional Dyspepsia Based on "Brain-gut Co-regulation" Theory
Yuting Yue, Min Wang, Zhifeng Tang
Journal of Contemporary Medical Practice.2024; 6(7): 242. CrossRef
The role of psychological factors in functional gastrointestinal disorders: a systematic review and meta-analysis
Liyanran Yan, Xueli Zhang, Yan Li, Chengjiang Liu, Hua Yang, Chunchun Yang
International Journal of Colorectal Disease.2023;[Epub] CrossRef
A Comparison of the Effects of COVID-19 on Irritable Bowel Syndrome and Inflammatory Bowel Disease Patients While Working at Home and in the Office: A Retrospective Study
Spyridon Zouridis, Muhammad Farhan Ashraf, Patrick Tempera, Ahmad Abulawi, Umer Ejaz Malik, Hadi Minhas, Asra Batool
Cureus.2023;[Epub] CrossRef
Quality of Life and Personality Traits in Dyspepsia Patients and Healthy Individuals: A Case-Control Study
Tayebeh Jamshidbeigi, Amir Adibi, Farhad Mohammadi, Mahtab Bonyadi, Elham Shafiei
Zahedan Journal of Research in Medical Sciences.2023;[Epub] CrossRef
Influence of Shift Work on The Health of Nursing Professionals
Pablo Roman, Isabel Perez-Cayuela, Esther Gil-Hernández, Miguel Rodriguez-Arrastia, Adrian Aparicio-Mota, Carmen Ropero-Padilla, Lola Rueda-Ruzafa
Journal of Personalized Medicine.2023; 13(4): 627. CrossRef
Research trends in the field of the gut-brain interaction: Functional dyspepsia in the spotlight – An integrated bibliometric and science mapping approach
Tai Zhang, Beihua Zhang, Xiangxue Ma, Jiaqi Zhang, Yuchen Wei, Fengyun Wang, Xudong Tang
Frontiers in Neuroscience.2023;[Epub] CrossRef
Relationship between job stress and impaired fasting glucose in male steel industry workers: a cross-sectional study
Hyun-Kyo Lee, Inho Lee, Jisuk Yun, Yong-Jin Lee, Eun-Chul Jang, Young-Sun Min, Soon-Chan Kwon
Annals of Occupational and Environmental Medicine.2023;[Epub] CrossRef
A study on the clinical characteristics of functional dyspepsia patients with or without depression
Di An
Asian Journal of Surgery.2022; 45(1): 605. CrossRef
Factors Affecting Korean Medicine Health Care Use for Functional Dyspepsia: Analysis of the Korea Health Panel Survey 2017
Boram Lee, Changsop Yang, Mi Hong Yim
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COVID-19 Pandemic and Irritable Bowel Syndrome — is there a Relationship?
V. A. Akhmedov
Russian Journal of Gastroenterology, Hepatology, Coloproctology.2022; 32(2): 85. CrossRef
The efficacy of cognitive behavior stress management on functional dyspepsia
Min Cheng, Xiu-E. Zhou, Yu-Chen Xu, Hong-Mei Dou
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Defining the Primary Work Stress Factors of Chinese Coal Miners—A Mixed-Methods Study
Hongxi Di, Shujahat Ali, Yiming Lu
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Sabrina Xin Zi Quek, Evelyn Xiu Ling Loo, Alla Demutska, Chun En Chua, Guan Sen Kew, Scott Wong, Hui Xing Lau, En Xian Sarah Low, Tze Liang Loh, Ooi Shien Lung, Emily C W Hung, M. Masudur Rahman, Uday C Ghoshal, Sunny H Wong, Cynthia K Y Cheung, Ari F Sya
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Effects of electroacupuncture on stress-induced gastric dysrhythmia and mechanisms involving autonomic and central nervous systems in functional dyspepsia
Sujuan Zhang, Yi Liu, Shiying Li, Feng Ye, Robert D. Foreman, Jiande D. Z. Chen
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology.2020; 319(1): R106. CrossRef

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Case Report

HCFC-123-induced toxic hepatitis and death at a Korean fire extinguisher manufacturing facility: a case series: Mu Young Shin, Jong Soo Park, Hae Dong Park, Jihye Lee; Ann Occup Environ Med 2018;30:20. Published online March 28, 2018; DOI: https://doi.org/10.1186/s40557-018-0231-2

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Background

Exposure to sustained high concentrations of HCFC-123 is known to be hepatotoxic. We report two simultaneous cases of toxic hepatitis related to exposure to 2,2-dichloro-1,1,1-trifluoroethane (HCFC-123), a common refrigerant, at a Korean fire extinguisher manufacturing facility.

Case presentation

Patients A and B were men aged 21 and 22 years, respectively, with no notable medical histories. They had recently started working for a manufacturer of fire extinguishers. During the third week of their employment, they visited the emergency center of a general hospital due to fever, lack of appetite, and general weakness. At the time of their visit, they were suspected as having hepatitis due to elevated aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), gamma-glutamyl transferase (GGT), and total bilirubin levels and were hospitalized. However, as their condition did not improve, they were moved to a tertiary general hospital. After conservative treatment, one patient improved but the other died from acute hepatic failure. Assessments of the work environment showed that the short-term exposure levels of HCFC-123 for valve assembly processes were as high as 193.4 ppm. A transjugular liver biopsy was performed in patient A; the results indicated drug/toxin-induced liver injury (DILI). Given the lack of a medical history and the occupational exposure to high levels of HCFC-123, a hepatotoxic agent, the toxic hepatitis of the workers was likely related to HCFC-123 exposure.

Conclusions

Work environment assessments have not included this agent. To the best of our knowledge, we are the first to report a case of death related to HCFC-123-induced liver damage. Our findings suggest that exposure standards and limits for HCFC-123 must be developed in Korea; work environments will have to be improved based on such standards.

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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

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Research Article

Carbon disulfide exposure estimate and prevalence of chronic diseases after carbon disulfide poisoning-related occupational diseases: Hweemin Chung, Kanwoo Youn, Kyuyeon Kim, Kyunggeun Park; Ann Occup Environ Med 2017;29:52. Published online October 26, 2017; DOI: https://doi.org/10.1186/s40557-017-0208-6

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Background

In Korea, Carbon disulfide (CS₂) toxicity was an important social problem from the late 1980s to the early 1990s but there have been few large-scale studies examining the prevalence of diseases after CS₂ exposure discontinuance. So we investigated past working exposure to CS₂ characteristics from surviving ex-workers of a rayon manufacturing plant including cumulative CS₂ exposure index. Furthermore, we studied the prevalence of their chronic diseases recently after many years.

Methods

We interviewed 633 ex-workers identified as CS₂ poisoning-related occupational diseases to determine demographic and occupational characteristics and reviewed their medical records. The work environment measurement data from 1992 was used as a reference. Based on the interviews and foreign measurement documents, weights were assigned to the reference concentrations followed by calculation of individual exposure index, the sum of the portion of each time period multiplied by the concentrations of CS₂ during that period.

Results

The cumulative exposure index was 128.2 ppm on average. Workers from the spinning, electrical equipment repair, and motor repair departments were exposed to high concentrations of ≥10 ppm. Workers from the maintenance of the ejector, manufacturing of CS_2, post-process, refining, maintenance and manufacturing of viscose departments were exposed to low concentrations below 10 ppm. The prevalence for hypertension, coronary artery disease, cerebrovascular disease, diabetes, arrhythmia, psychoneurotic disorder, disorders of the nervous system and sensory organ were 69.2%, 13.9%, 24.8%, 24.5%, 1.3%, 65.7%, 72.4% respectively.

Conclusions

We estimated the individual cumulative CS₂ exposure based on interviews and foreign measurement documents, and work environment measurement data. Comparing the work environment measurement data from 1992, these values were similar to them. After identified as CS₂ poisoning, there are subjects over 70 years of average age with disorders of the nervous system and sensory organs, hypertension, psychoneurotic disorder, cerebrovascular disease, diabetes, coronary artery disease, and arrhythmia. Because among ex-workers of the rayon manufacturing plant, only 633 survivors recognized as CS₂ poisoning were studied, the others not identified as CS₂ poisoning should also be investigated in the future.

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Ruohan Zhao, Yinghan Chen, Yong Liang
Angewandte Chemie International Edition.2024;[Epub] CrossRef
Bioorthogonal Delivery of Carbon Disulfide in Living Cells
Ruohan Zhao, Yinghan Chen, Yong Liang
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Sustainability.2022; 14(18): 11402. CrossRef
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Bai Sun, Guoji Shi, Zhuo Tang, Pengyu Zhang, Yuxian Guo, Shuguang Zhu, Jinyun Liu
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Associations of urinary carbon disulfide metabolite with oxidative stress, plasma glucose and risk of diabetes among urban adults in China
Tao Xu, Bin Wang, Xing Wang, Shijie Yang, Limin Cao, Weihong Qiu, Man Cheng, Wei Liu, Linling Yu, Min Zhou, Dongming Wang, Jixuan Ma, Weihong Chen
Environmental Pollution.2021; 272: 115959. CrossRef

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Research Article

Comparison of anxiety and depression status between office and manufacturing job employees in a large manufacturing company: a cross sectional study: WonYang Kang, Won-Ju Park, Keun-Ho Jang, Hyeong-Min Lim, Ji-Sung Ann, Seung-hyeon Cho, Jai-Dong Moon; Ann Occup Environ Med 2016;28:47. Published online September 15, 2016; DOI: https://doi.org/10.1186/s40557-016-0134-z

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Background

The aim of this study was to investigate whether type of work is associated with anxiety and depression using the Hospital Anxiety and Depression Scale (HADS). Additionally, we investigated the impact of number of working hours on anxiety and depression.

Methods

A total of 1774 workers participated and completed the HADS to determine their levels of anxiety and depression. All subjects were employed at one of two manufacturing plants for the same company. Of all participants, 222 were employed in office jobs and 1552 in manufacturing jobs.

Results

Results of multivariate logistic regression analysis including age, sex, body mass index, smoking status, alcohol consumption, regular exercise, factory region, and working hours, indicated that employment in an office job was associated with a 2.17-fold increase in the odds of anxiety compared to a manufacturing job (odds ratio [OR] = 2.17; 95 % confidence interval [CI], 1.24–3.80). Office jobs were also associated with a 1.94-fold increase in the odds of depression (OR = 1.94; 95 % CI, 1.34–2.82). In addition, number of hours worked was significantly associated with depression, and working hours significantly modified the effect of office job employment on the risk of depression.

Conclusions

Office job workers had higher levels of anxiety and depression than those working in manufacturing jobs. Our findings suggest that occupational physicians should consider the organizational risks faced by office job employees, and consider the differences in psychological health between office and manufacturing job workers when implementing interventions.

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Case Report

A Case of Lead Poisoning by Ingesting Herbal Pills Tainted by Lead during the Manufacturing Process: Young Hoo Shin, Jun Seok Son, Young Wook Kim, Chang Ho Chae, Ja Hyeon Kim, Chan Woo Kim, Jun Ho Lee; Korean Journal of Occupational and Environmental Medicine 2010;22(3):271-277. Published online September 30, 2010; DOI: https://doi.org/10.35371/kjoem.2010.22.3.271

Abstract PDF

BACKGROUND
This is a case report of lead poisoning after herbal pill ingestion. We report this case here as a reminder that contamination during the manufacturing process is an important issue regarding herbal pills. Case Report: A 37-year-old male was admitted to the hospital with abdominal pain caused by cholecystitis. He was transferred to the Department of Occupational and Environmental Medicine on 26 December 2008, because of anemia. On follow-up examination post cholecystectomy, the patient had increasing blood lead levels. There was no specific finding in his medical history, but he had been taking herbal pills for 3 months to treat dyspepsia. We performed an analysis on the herbal pills, and determined a lead concentration of 1485 mg/kg. When he was admitted to the hospital, the patient had a blood lead level of 84.13 microgram/dL and a zinc protoporphyrin level was 230 microgram/dL. The patient was treated with 250 mg of Penicillamine, 4 times per day. During follow-up 3 weeks later, the patient's blood lead level had been reduced to 36.52 microgram/dL which allowed us to take him off of Penicillamine. By 7 months follow-up, the patient's blood lead concentration had fallen from 36.52 microgram/dL to 20.93 microgram/dL.
CONCLUSION
Lead poisoning was confirmed by analyzing blood lead levels and the cause was herbal pills. Upon analysis of the herbal pills, we have discovered that the herbal pills contained an amount of lead acquired during the manufacturing process, based on the high levels of this heavy metal in comparison to other metals. Private herbal pill manufacturing plants need systematic management and oversight.

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Collective exposure to lead from an approved natural product-derived drug in Korea
Dae-Young Lim, Won-Yang Kang, Ji-Sung Ahn, Seunghyeon Cho, Suwhan Kim, Jai-Dong Moon, Byung-Chan Lee, Won-Ju Park
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Original Article

The Comparison of Job Stress Factors, Psychosocial Stress and Their Association between Research and Manufacturing Workers in an Automobile Research and Developing Company: Hyunchul Ryou, Jeong Ok Kong, Hun Goo Lee, Soo Jin Lee, Sanghyo Chu, Yoonhee Jung, Jaechul Song; Korean Journal of Occupational and Environmental Medicine 2009;21(4):337-345. Published online December 31, 2009; DOI: https://doi.org/10.35371/kjoem.2009.21.4.337

Abstract PDF

OBJECTIVES
This study was conducted to investigate the job stress factors, psychosocial stress and their associations in workers engaged in the research and development of vehicles, and according to job role.
METHODS
We recruited 4,066 subjects from workers at a research and development center of an automobile company. A total of 2,764 workers answered the questionnaire about socio-demographic factors, health behaviors, work-related factors, subjective labor intensity, KOSS, and SF-PWI. The final analysis included 2,282 male manufacturing and research workers. Univariate analyses and multiple logistic analyses were conducted on the complete questionnaire data to compare the job stress factors, psychosocial stress and their associations between research and manufacturing workers.
RESULTS
The adjusted Odds ratios comparing the high risk group to the low risk group regarding PWI group were 2.23(95%CI=1.63-3.04) in "Lack of rewards", 1.64(95%CI=1.20-2.24) in "Interpersonal conflict", 1.59(95%CI=1.15- 2.20) in "Organizational injustice", 1.58(95%CI=1.17-2.14) in "Occupational climate" and 1.43(95%CI=1.05-1.94) in "Job insecurity" among research workers, and 2.46(95%CI=1.59 -3.80) in "Lack of rewards" and 1.94(95%CI=1.17-3.22) in "Organizational injustice" among manufacturing workers.
CONCLUSIONS
There are differences in job stress factors between research and manufacturing workers. Further studies and discussions based on quantitative methodology for seeking more fundamental causes of these differences are required to establish job stress intervention plans and policies.

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Original Article

Lifestyle and Work related Factors Associated with Serum PFOA among Workers at Manufacturing Companies: Sang Hwan Jang, Chae Kwan Lee, Dae Hwan Kim, Kwon Bok Kim, Jin Hong Ahn, Hwi Dong Kim, Chang Hee Lee, Jeong Ho Kim, Jong Tae Lee; Korean Journal of Occupational and Environmental Medicine 2008;20(3):233-244. Published online September 30, 2008; DOI: https://doi.org/10.35371/kjoem.2008.20.3.233

Abstract PDF

OBJECTIVES
The objective of this study was to determine serum perfluorooctanoic acid (PFOA) concentrations and to investigate the relationship of lifestyle, health status and work-related factors among workers at manufacturing companies with possible occupational exposure to PFOA.
METHODS
The study subjects were 315 workers (male 203, female 112) of manufacturing companies with possible exposure to PFOA from August to December, 2007. A questionnaire was administered to investigate lifestyle and work-related factors. Serum PFOA concentrations were analyzed by LCMS/ MS, and liver function and total cholesterol were also tested.
RESULTS
Serum PFOA concentrations ranged from 1.0 to 40.9 ng/mL (mean 8.0 ng/mL). Serum PFOA concentrations increased with age. Male workers had higher PFOA concentration than female workers (male 9.0 ng/mL; female 6.3 ng/mL). According to stepwise multiple regression analysis, factors significantly associated with PFOA concentration were male, being older, higher total cholesterol, and lower body mass index. Adjusted for age and gender by logistic regression, dyeing and finishing textiles had significantly higher odds ratio (OR) of 6.16, and moulding patterns, moulds and industrial patterns (OR=4.84), sections for ships (OR=3.87), and plastics synthetic leather (OR=10.05) had marginally significantly high odds ratios.
CONCLUSIONS
This study demonstrated the factors affecting serum PFOA concentration of workers at manufacturing companies. Further study is needed to ensure the effect of occupational exposure on serum PFOA concentration.

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Original Article

Relationship between Injury Occurrence and Workplace Organization in Small-sized Manufacturing Factories: Kun Sei Lee, Hyeongsu Kim, Soung Hoon Chang, Kyung Hee Jung-Choi, Won Ki Oh, Jae Wook Choi, Kwan Hyung Yi, Ji Young Oh; Korean Journal of Occupational and Environmental Medicine 2006;18(2):73-86. Published online June 30, 2006; DOI: https://doi.org/10.35371/kjoem.2006.18.2.73

Abstract PDF

OBJECTIVE: This study evaluated the relationship between injury occurrence and workplace organization in small-sized, manufacturing factories in Korea.
METHODS
Using data from the 2004 Occupational Safety and Health Survey in Korea, this study compared workplace organizational factors (general characteristics, employee characteristics and health and safety characteristics) with injury occurrence of 1,866 small-sized, manufacturing factories (65,921 population factories after weighting). General characteristics of factories comprised location, type and classification of industry. Employee characteristics comprised proportion of manual workers and female workers, average working hours per week and shiftwork. Health and safety characteristics comprised type of safety and health manager, committee for occupational safety and health, labor union, health and safety regulation, monthly health and safety training time, score of health and safety activity and score of safety culture.
RESULTS
The following characteristics of injury-occurrence in small-sized, manufacturing factories were determined by multivariate analysis. In terms of general characteristics, the risk of injury-occurrence was higher in Jeolla area than Gyeongin area in outside associate than other enterprises and in coke, refined petroleum products and nuclear fuel, wood and products of wood, food products and beverages and fabricated metal products, except machinery and furniture industries than television and communication equipment and apparatus industries. In terms of employee characteristics, injury-occurrence significantly increased in factories with greater proportion of manual worker and with a higher rate of working hours per week. But significantly decreased in factories with a higher proportion of female workers. In terms of health and safety characteristics, injury-occurrence significantly increased in factories with a self-appointed safety manager, with unorganized union, with a more active committee for occupational safety and health, with unimplemented health and safety regulations, with longer monthly safety and health training time, and with a lower score of safety culture.
CONCLUSIONS
This study demonstrated that several factors of workplace organization were significantly related with injury-occurrence in factories. These findings are supposed to raise the need for making efforts in workplace organization to improve injury prevention.

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Kwan Hyung Yi, Seung Soo Lee
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Wook-Sung Kim, Young-Bok Cho, Seok-Jae Kim, Kyong-Jin Ryu, Yoo-Won Lee
Journal of the Korean society of Fisheries Technology.2014; 50(4): 614. CrossRef
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Annals of Occupational and Environmental Medicine.2013;[Epub] CrossRef

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Original Article

Pneumoconiosis with Workers of Manufacturing Industry in Incheon: Yeon Soon Ahn, Kyoo Sang Kim, Ho Keun Chung, Il Soon Whang, Jaehoon Roh; Korean Journal of Occupational and Environmental Medicine 1997;9(4):589-603. Published online December 31, 1997; DOI: https://doi.org/10.35371/kjoem.1997.9.4.589

Abstract PDF

Most of pneumoconiosis found in Korea can be categorized in coal worker's pneumoconiosis. However, in recent years, pneumoconiosis has been frequently found in the workers of manufacturing factories. Accordingly, this study was carried out to investigate relationship of dust exposure history and development and progress of pneumoconiosis. Chest radiographs, history of dust exposure, and other data of 144 workers, who were diagnosed as suspecter pneumoconiosis (0/l) or pneumoconiosis in special health examination center in Incheon from 1986 to 1996, were reviewed. The results were as follows ; 1. According to the type of main exposure, most common type of exposure was foundry dust(93workers, 64.6%), followed by welding fume(16workers, 11.1%), talc dust, lime dust and etc. 2. Among 144 workers, the history of dust exposure was investigated in 86 workers. Mean ages of 86 workers at the present study, initial exposure to the dusts, and at the time of initial diagnosis as having pneumoconiosis were 52.1, 29.1 and 46.5 years, respectively. The mean duration of exposure was 17.3 years. 3. Comparing the type of main exposure with dust exposure history, initially exposed age of welders, foundry workers, workers exposed to coal dust and other dusts were 24.6, 30.7, 28.0 and 28.5 years, respectively. Ages at the time of diagnosis as having pneumoconiosis of welders, foundry workers, coal dust and other dusts were 41.3, 49.3, 46.4 and 44.1 years, respectively. The duration of exposure to main dust of welders, foundry workers, workers exposed to coal dust and other dusts were 16.8, 18.2, 13.3 and 11.6 years, respectively. Therefore initially exposed age was significant difference between the welders and the foundry workers (p<.05). Age which was diagnosed pneumoconiosis was significant difference between the welders, workers exposed to other dusts and the foundry workers (p<.01). And exposure duration of main dust was significant difference between the workers exposed to other dusts and foundry workers (p<.01) 4. Initially diagnosed X-ray category of the workers were category 0/l (76workers, 52.8%), 1/0 (35workers, 24.3%) Therefore, workers' pneumoconiosis of manufacturing factories was mild, relatively. And there was no significant difference between initially diagnosed X-ray category of the workers and dust exposure history. 5. Among 97 workers, who could follow up more than 1 year, 60 workers(61.9%) were not changed, 24 workers (24.7%) were progressed, 13 workers (13.4%) were improved in their initially diagnosed X-ray category. Among 11 welders, initially diagnosed X-ray category of 5 welders(45.5%) were improved and of only 1 welder was progressed. But, among 19 workers exposed to other dusts, 10 (52.6%) workers were progressed and none of them were improved. 6. Among 53 workers, who were Initially diagnosed X-ray category was 0/l, 12 workers (22.6%) were progressed and 5 workers (9.4%) were improved in their initially diagnosed X-ray category. And among 40 workers, who were initially diagnosed X-ray category was 1, 12 workers(30.0%) were progressed and 7 workers(17.5%) were improved. Above results suggest that not a few workers of manufacturing factories have pneumoconiosis and their pneumoconiosis is progressed. Therefore, we have to prepare management plan and to study epidemiologic findings of pneumoconiosis with workers of manufacturing factories.

Citations

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Cause-Specific Mortality Due to Malignant and Non-Malignant Disease in Korean Foundry Workers
Jin-Ha Yoon, Yeon-Soon Ahn, Suminori Akiba
PLoS ONE.2014; 9(2): e88264. CrossRef
Occupational Diseases in Korea
Seong-Kyu Kang, Eun A Kim
Journal of Korean Medical Science.2010; 25(Suppl): S4. CrossRef

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Original Article

A Survey of Hepatitis B Virus Markers by EIA Method among Steel Manufacturing Workers: Jung Gu Kirn, Bbk Dong Nam, Sam Deug Bae, Myung Wha Ha, Doo Hie Kim, Seung Won Kang, Jong Young Lee; Korean Journal of Occupational and Environmental Medicine 1996;8(2):249-257. Published online September 30, 1996; DOI: https://doi.org/10.35371/kjoem.1996.8.2.249

Abstract PDF: A study for seroprevalence of Hepatitis B virus markers (HBsAg, Anti-HBs, HBeAg and Anti-HBe) by EIA method and the Liver Function Test(SGOT and SGPT) using kinetic method was carried :out from January; to October 1995 :among male workers of a .major iron and steel manufacturing company, located,,in Pohang. The results were as follows; 1. The distribution of hepatitis B virus markers showed that the proportions of HBsAg(+)/Anti-HBs (-), HBsAg(-)/Anti-HBs (+) 'and HBsAg(+)/Anti-HBs (+) were 8.1%, 60.5% and 0.1%, respectively. The positive rate of HBsAg in all subjects was 8.2% whereas that of anti-HBs was 60.6%. 2. The proportions of HBsAg(+)/Anti-HBs (-) and HBsAg(-)/Anti-HBs (+) increased significantly with age. While the distribution of hepatitis B virus markers exhibited no significant differences among the groups classified by educational background or work type. 3. The proportion of drinkers in HBsAg (+)/Anti-HBs (-) (73; 9%) was significantly lower than those of HBsAg (-)/Anti-HBs (-) and HBsAg (-)/Anti-HBs (+) (84.6% and 85.7% respectively). The proportions of smoking for the three groups of HBsAg (-)/Anti-HBs(+),-HBsAg (+)/Anti-HBs (-) and HBsAg (-)/Anti-HBs (-) were 54.3%, 53.7% and 53.0%, respectively (p<0.01). The proportion of the subjects with abnormal liver function test in HBsAg (+)/Anti-HBs (-) was 40.1%, whereas those in HBsAg (-)/Anti-HBs (-) and HBsAg(-)/Anti-HBs (+) were 21.9% and 18.4%, respectively. 4. The distribution of e Ag markers among HBsAg (+) subjects showed that the proportions of HBeAg(+)/Anti-HBe(-), HBeAg(-)/Anti-HBe(+) and HBeAg(+)/Anti-HBe(+) were 31.3%, 55.0% and 1.6%, respectively. The proportion of HBeAg(+)/Anti-HBe(-) decreased significantly with age and those of HBeAg(-)/Anti-HBe(-) and HBeAg(-)/Anti-HBe(+) increased with age. The positive rate of HBeAg among HBsAg (+) subjects was 32.9%. In conclusion, as a screening method, EIA is. recommended to test hepatitis B virus markers, especially when examining Anti-HBs more sensitively. For the workers of the iron and steel manufacturing company studied, liver diseases caused by other than hepatitis B should be given a special care including an education avoiding alcohol drinking.

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Original Article

A Post-examination Health Care Status of Workers with Pneumoconiosis in Manufacturing Factories: Sung Goon Kim, Jaehoon Roh, Yeon Seon Ahn; Korean Journal of Occupational and Environmental Medicine 1994;6(2):421-428. Published online September 30, 1994; DOI: https://doi.org/10.35371/kjoem.1994.6.2.421

Abstract PDF: Most of the pneumoconiosis, which is common occupational diseases, is found here in Korea can be Gategorized to coal miner's pneumoconiosis. However, recently pneumoconiosis has been found in tHe workers of manufacturing factories, Periodic Health examination is important not only detection of occupationsl disease but also post-examination Health care of occupational disease patient. Accordingly, to study post-examination Health GaTe statHs of workers with pneumoconiosis diagnosed from 1991 to 1993 in the perioaic Health examination, all 43 pneumoconiosis patients in 22 manufacturing factories in Incheon were reviewed. Chest radiologic findings of 43 workers were suspected pneumoconiosis (20 workers, 46.5%) , pneumoconiosis stage 1(20 workers, 45.5%) and pneumoconiosis stage II (3 workers, 7.0%) . Among the 1.espondents, 40 workers (93.0%) answered that they received their health examination results and 24 werkers (55.8%) Had reguest for compensation of occupationsl disease. Only 14 workers(32.6%) Had changed their workplace while 21 workers (48.8%) did not. Reasons for not taking the post-examination health care enough were worker's ignorance of adminstrative process for Compensation (28 workers,65.1%) , mild status of dlsease (6 workers, 14.0%) and financial problem (3 workers, 7.0%) . Post~examination health care of the workers diagnosed as pneumoconiosis had significant correlation with the presence of health care manager in workplace and the employer concerns for occupational disease of workers. The improvement of working environment is related witH the presence of labor union in workplace. These results suggested that the presence of health care manager in the workplace and concerns for workers health by employer were important in performing appropriate post-examination health care for workers with pneumoconiosis in manufacturing factories.

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