Annals of Occupational and Environmental Medicine

Sung Il Cho

6 Articles

The Relationship between Shift Work and Work-related Injuries among Korean Workers: Tae Jun Park, Do Myung Paek, Kee Ock Joh, Jung Sun Park, Sung il Cho; Korean Journal of Occupational and Environmental Medicine 2012;24(1):52-60. Published online March 31, 2012; DOI: https://doi.org/10.35371/kjoem.2012.24.1.52

OBJECTIVES
The aim of this study was to evaluate the relationship between shift work and work-related injuries in a representative sample of Korean workers.
METHODS
We used data from the Korean Working Condition Survey of 2006. The participants were 7,075 Korean workers 15 to 64 years of age. Logistic regression was employed to estimate the relationship between shift work and work-related injury using the SAS version 9.2 program.
RESULTS
Shift work was significantly related to work-related injuries compared to non-shift workers(OR 2.40, 95% CI=1.65~3.48). When personal and occupational risk factors were accounted for, shift work had a statistically meaningful relationship with work-related injuries compared to non-shift work(OR 1.79, 95% CI=1.20~2.66).
CONCLUSIONS
In this study, shift workers appear to have a higher risk of work-related injuries compared to non-shift workers. Work-related injuries in shift workers could be attributed to circadian rhythm disorder and sleep problems. Suitable arrangements that ensure flexible working times are needed for shift workers. Further study will be needed to identify and mitigate work-related injuries among shift workers.

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Pathophysiology of Memory Inception and Retrogression and Clock Dependent Divergence in Cognizance
Md. Arifur Rahman Chowdhury, Md Mazedul Haq, Narayan Kumar, Chandresh Sharma
Chronobiology in Medicine.2021; 3(2): 43. CrossRef
Association of work–life balance with occupational injury and work-related musculoskeletal pain among Korean workers
Jong-min An, Jinseok Kim, Seongyong Yoon, Kuck-Hyun Woo, Seong-yong Cho, Kibeom Kim, Ha-ram Jo
Annals of Occupational and Environmental Medicine.2020;[Epub] CrossRef
Light and Life at Night as Circadian Rhythm Disruptors
Eunil Lee, Mari Kim
Chronobiology in Medicine.2019; 1(3): 95. CrossRef
Association of discrimination and presenteeism with cardiovascular disease: the Fourth Korean Working Conditions Survey
Kyusung Kim, Sung-il Cho, Domyung Paek
Annals of Occupational and Environmental Medicine.2019;[Epub] CrossRef
Relationship between occupational injuries and the provision of safety and health information: data from the 4th Korean working conditions survey
Ju-il Seo, Gab-Sik Shin, Min Gi Kim, Young-Sun Min
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
Chemical use in the semiconductor manufacturing industry
Sunju Kim, Chungsik Yoon, Seunghon Ham, Jihoon Park, Ohun Kwon, Donguk Park, Sangjun Choi, Seungwon Kim, Kwonchul Ha, Won Kim
International Journal of Occupational and Environmental Health.2018; 24(3-4): 109. CrossRef
Association between rotating night shift work and metabolic syndrome in Korean workers: differences between 8-hour and 12-hour rotating shift work
Jae-Il OH, Hyeon Woo YIM
Industrial Health.2018; 56(1): 40. CrossRef
Associations of Shift Work and Its Duration with Work-Related Injury among Electronics Factory Workers in South Korea
Jia Ryu, Kyunghee Jung-Choi, Kyung-Hwa Choi, Ho-Jang Kwon, Chungwon Kang, Hyunjoo Kim
International Journal of Environmental Research and Public Health.2017; 14(11): 1429. CrossRef
The relationship between spontaneous abortion and female workers in the semiconductor industry
Heechan Kim, Ho-Jang Kwon, Jeongbae Rhie, Sinye Lim, Yun-Dan Kang, Sang-Yong Eom, Hyungryul Lim, Jun-Pyo Myong, Sangchul Roh
Annals of Occupational and Environmental Medicine.2017;[Epub] CrossRef
Adaptation Experience of Sleep in New Nurses
Hyoung-Sook Park, Jae-Hyun Ha
Journal of Korean Academy of Fundamentals of Nursing.2016; 23(1): 21. CrossRef
The relationship between night work and involuntary weight change: data from the fifth Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012)
Jongho Kwon, Jung-Woo Park, Jin-Soo Park, Seyoung Kim, Hyunrim Choi, Sinye Lim
Annals of Occupational and Environmental Medicine.2016;[Epub] CrossRef
Night shift work and inflammatory markers in male workers aged 20–39 in a display manufacturing company
Seong-Woo Kim, Eun-Chul Jang, Soon-Chan Kwon, Wook Han, Min-Sung Kang, Young-Hyeon Nam, Yong-Jin Lee
Annals of Occupational and Environmental Medicine.2016;[Epub] CrossRef
Comparison of Physical, Mental Health Status and Work-related Injuries According to the Working Environment of Nurses
Hye-Sim Kim, Yoon-Shin Kim, Min-Hee Hong, Jin-Uk Kim
Journal of the Korea Academia-Industrial cooperation Society.2015; 16(1): 527. CrossRef
Association between shift work and obesity according to body fat percentage in Korean wage workers: data from the fourth and the fifth Korea National Health and Nutrition Examination Survey (KNHANES 2008–2011)
ManKi Son, Byeong Jin Ye, Jung-Il Kim, ShinUk Kang, Kap-Yeol Jung
Annals of Occupational and Environmental Medicine.2015;[Epub] CrossRef
A Review on the Job Stress Measurements in Nuclear Power Plant Workers for Human Error Prevention
Seon Soo Kim, Meiling Luo, Yeon Ju Oh, Yong Hee Lee
Journal of the Ergonomics Society of Korea.2013; 32(1): 47. CrossRef

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Relationship between Workplace Physical and Chemical Hazard Exposures and Mental Health Problems in Korea: Kee Ock Joh, Tae Jun Park, Jae Il Oh, Do Myung Paek, Jung Sun Park, Sung Il Cho; Korean Journal of Occupational and Environmental Medicine 2011;23(3):287-297. Published online September 30, 2011; DOI: https://doi.org/10.35371/kjoem.2011.23.3.287

Abstract PDF

OBJECTIVES
Mental health and work efficiency are adversely affected by exposure to physical and chemical hazards in the workplace. This study is the first large scale evaluation of the relationship between physical and chemical hazard exposure in the workplace in relation to the mental health of Korean workers.
METHODS
A national survey of a random sample of workers (n=10,043) was conducted between June and September 2006 in Korea. Physical and chemical hazards in the workplace were considered if exposure occurred over more than a quarter of the time spent at work. Mental health problems were defined as work-related depression, anxiety or insomnia. We analyzed whether physical and chemical hazards were independent risk factors for work-related mental health problems by multiple logistic regression analysis after adjusting for age, gender, employment type, education, occupation, duty schedule, work hours, smoking, and alcohol consumption.
RESULTS
The mean age of surveyed workers was 42 years and 58% were male. A total of 7.8% of workers had work-related mental health problems. Exposure to high temperature, mist, fumes, dust, chemicals, and radiation were associated with an increased risk of work-related mental health problems.
CONCLUSIONS
This study reaffirmed that physical and chemical hazard exposure in the workplace significantly elevates the risk of work-related mental health problems.

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Association between physical hazardous agent exposure and mental health in the Korean working population: the 5th Korean Working Conditions Survey
Daeil Kwon, Kyeongmin Kwak, Kiook Baek, Youngchan Chi, Sewhan Na, Jong-Tae Park
Annals of Occupational and Environmental Medicine.2021;[Epub] CrossRef
Use of Frequency Analysis of Exposure of Hazards by Occupations: Findings from the Third and Fourth Korean Working Conditions Survey
Soon-Chan Kwon
Soonchunhyang Medical Science.2019; 25(1): 37. CrossRef
Factors Associated with Depression among Workers by Socio-economic Factors, Health Behaviors, and Characteristics of Work Environment
Hyunkyung Lee, Minsung Sohn, Mankyu Choi
Korean Journal of Health Education and Promotion.2013; 30(5): 125. CrossRef

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Association between Physical Workload and Work-related Back Pain: A Nationwide Study: Jae Il Oh, Dong Hyun Yoo, Do Myung Paek, Jung Sun Park, Sung Il Cho; Korean Journal of Occupational and Environmental Medicine 2011;23(3):298-308. Published online September 30, 2011; DOI: https://doi.org/10.35371/kjoem.2011.23.3.298

Abstract PDF

OBJECTIVES
To date, no population-based epidemiological studies have estimated the association between physical workload (standing or walking, carrying heavy loads, carrying people, repetitive hand or arm movements, wearing protective equipment) and work-related back pain in Korea. The purpose of this study was to evaluate the relationship between physical workload and work-related back pain using a nationwide survey.
METHODS
We analyzed data obtained from working men and women age 15 to 64 (n=10,043) who participated in the 2006 national working condition survey of random sample workers in Korea. Using both simple and multiple logistic regression analysis, the association between physical workload and work-related back pain was evaluated.
RESULTS
Carrying heavy loads, repetitive hand or arm movements, and wearing protective equipment were associated with an increased risk of work-related back pain.
CONCLUSIONS
This study identifies that an increased risk of work-related back pain related to the nature and intensity of the physical workload of the general working population in Korea. We also found a strong association between repetitive hand or arm movements and back pain.

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A study on Related Factor and Knowledge of Back Pain in Workers Employed at Cement factory
Gi-Yeol Kim, Jung-Lim Oh, Kyoung-Ok Hwang
Journal of the Korea Academia-Industrial cooperation Society.2015; 16(1): 536. CrossRef

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Heart Rate Variability of Carbon Disulfide Poisoned Subjects after Exposure Cessation: Sang Yoon Lee, Sung Il Cho, Do Myung Paek, Chang Bum Byeon, Mi Jeong Kim, Kyung Keun Park, Sang Hyeok Yim, Kil Seung Yang, Chang Kook Hwang, Hyung Joon Jhun; Korean Journal of Occupational and Environmental Medicine 2006;18(2):123-129. Published online June 30, 2006; DOI: https://doi.org/10.35371/kjoem.2006.18.2.123

Abstract PDF: OBJECTIVES
A previous study conducted in 2000 measuring the heart rate variability (HRV) of carbon disulfide (CS2)-poisoned subjects suggested that their HRV was reduced after exposure cessation. However, the study was limited by the following procedural limitations: (1) only 71 CS2-poisoned subjects participated, (2) no females participated, and (3) the CS2-poisoned subjects were older than the controls. This study was therefore conducted to overcome these limitations of the earlier study.
METHODS
The study subjects comprised 122 retired workers with CS2 poisoning and the same number of age- and sex-matched controls. Information on individual age, sex, height, weight, smoking history, alcohol drinking, regular exercise, medical and occupational history, chest x-ray, and ECG recording of the two groups was collected though a self-administered questionnaire and a medical examination. Standard Deviation of NN intervals (SDNN), Root-Mean-Square of Successive Differences (RMSSD), Total Power (TP), Low Frequency (LF), High Frequency (HF), and LF/HF ratio were measured as HRV indices for 5 minutes in the sitting position.
RESULTS
Univariate analysis revealed that all HRV indices of CS2-poisoned subjects were lower than those of the controls. Multiple linear regression analysis showed that CS2 poisoning had negative association with all HRV indices and that its association with RMSSD was statistically significant (P<0.05).
CONCLUSIONS
This study suggests that CS2-poisoned subjects continue to have reduced HRV, even though the exposure has ceased.

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The Relationship between Heart Rate Variability and Metabolic Syndrome at a Rural Area: Kyoung Bok Min, Jin Young Min, Kyung Hee Jung-Choi, Hyung Joon Jhun, Sung Il Cho, Domyung Paek; Korean Journal of Occupational and Environmental Medicine 2004;16(4):459-466. Published online December 31, 2004; DOI: https://doi.org/10.35371/kjoem.2004.16.4.459

Abstract PDF: OBJECTIVES
The purpose of the present study was to estimate the prevalence of metabolic syndrome and to investigate the relation between metabolic syndrome and heart rate variability in a community population.
METHODS
The study design was cross-sectional, and 1028 subjects, aged 20~87 years, were recruited. Heart rate variability was measured in the sitting position for five minutes. The recorded data were assessed by time-domain (standard deviation of RR interval) and frequencydomain analysis. All subjects were examined for five components of metabolic syndrome.
RESULTS
The prevalence of metabolic syndrome in male and female subjects was 25.9% and 27.7%, respectively. The mean value of heart rate variability of the subjects was significantly different between healthy subjects and those with metabolic syndrome. The regression model showed that metabolic syndrome was negatively correlated with heart rate variability.
CONCLUSIONS
The results demonstrate that metabolic syndrome has potentially negative effects on the cardiovascular system, and that these effects could be detected by heart rate variability. Follow-up studies able to control the cohort effect are necessary to evaluate the relation between metabolic syndrome and heart rate variability.

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Evaluation of Health Exams on Local Vibration Illness among Shipyard Workers: Yeong Su Ju, Hong Ryul Choi, Mi Kyung Kim, Hong Sohn, Sun Ja Jeon, Sung Il Cho, Hyong Sik Kim; Korean Journal of Occupational and Environmental Medicine 1998;10(4):413-427. Published online December 31, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.4.413

Abstract PDF

A hand-arm vibration syndrome, local vibration illness, occurs in some workers who use hand held vibration tools. It consists of white fingers, diffusely distributed finger neuropathy, pain in the hand and arm, and a small excess risk of osteoarthritis. This study is aimed to identify effective methods to confirm local vibration illness among various health exams, which are mentioned in worker's special health exam regulation. In addition, this study is aimed to quantitatively assess the daily vibration exposure level as a major determinant of vibration illness. The subjects, 46 vibration workers, were selected according to the results of the first special health exam about vibration hazards at shipbuilding industry in 1997. They all had experiences of work related blanching of fingers. Fifteen controls, who had no vibration exposure at all, were also recruited to compare their test results with the results of vibration workers. We adopted 1 subjective and 6 objective tests to evaluate the effectiveness and feasibility for confirming local vibration illness. These tests were history taking of subjective symptoms according to the Stockholm classification, checking blood pressure of finger, checking grasp power, checking finger skin temperature, nail-bed pressing test, vibration perceptional threshold test, and skin prick test for pain perception. Among these, checking skin temperature, nail-bed pressing test, and vibration perception test included cold water provocations. We also estimated some vibration exposure levels of hand held vibration tools by using previously published data from one automobile company. In conclusion, history taking of subjective symptoms according to the Stockholm classification, nail-bed pressing test, and vibration perceptional threshold test were discovered to be effective to diagnose local vibration illness. Furthermore, vibration perceptional threshold on right fingers showed a dose-response relationship to daily vibration exposure levels. The parameter beta was 0.0005(+/-0.0002), and statistically significant by REM (random effects model).

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Assessment on the Actual Vibration Exposure of Workers Engaging in Vibration Induced Works
Kab-Bae Kim, Eun-Kyo Chung, Ki-Ho You, Jae-Kil Jang
Transactions of the Korean Society for Noise and Vibration Engineering.2012; 22(10): 940. CrossRef

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