Annals of Occupational and Environmental Medicine

Jae Bum Park

14 Articles

Combined effect of work from home and work during nonwork time on sleep disturbance: Jiyoung Lim, Hyundong Lee, Jae Bum Park, Kyung-Jong Lee, Inchul Jeong, Jaehyuk Jung; Ann Occup Environ Med 2023;35:e28. Published online July 31, 2023; DOI: https://doi.org/10.35371/aoem.2023.35.e28

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Background

Owing to the coronavirus disease 2019 pandemic, being exposed to work from home and work during nonwork time simultaneously can lead to sleep disturbance; however, their combined effect is unclear. We aimed to investigate the combined effect of work from home and work during nonwork time on sleep disturbance.

Methods

This study used data from the Sixth Korean Working Condition Survey and included 27,473 paid workers. Logistic regression analysis was conducted to investigate the relationship between work from home, work during nonwork time, and sleep disturbance according to sex. We re-classified participants into 4 groups based on their working from home (No/Yes) and working during nonwork time (No/Yes). The relative excess risk due to interaction was calculated to examine the effect of exposure to both telecommuting and non-regular work hours on sleep disturbance.

Results

Workers exposed to work from home and work during nonwork time had significantly higher risks of sleep disturbance for all, men, and women workers (OR [95% CI]: 1.71 [1.46–2.02], 1.79 [1.43–2.23], and 1.64 [1.29–2.08] for work from home and 3.04 [2.70–3.42], 3.61 [3.09–4.22], and 2.41 [2.01–2.90] for work during nonwork time, respectively). Compared to those who were not exposed to both factors, when workers had both job factors, the ORs (95% CI) of sleep disturbance for all, men, and women were 3.93 (2.80–5.53), 5.08 (3.21–8.03), and 2.91 (1.74–4.87), respectively. The relative excess risk due to interaction of work from home and work during nonwork time was not significant for sleep disturbance.

Conclusions

Work from home and work during nonwork time were each associated with sleep disturbance, but the interaction between the two factors on sleep disturbance was not observed in both men and women.

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Association between work from home and health-related productivity loss among Korean employees
Hyo Jeong Kim, Dong Wook Lee, Jaesung Choi, Yun-Chul Hong, Mo-Yeol Kang
Annals of Occupational and Environmental Medicine.2024;[Epub] CrossRef

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Association between split shift work and work-related injury and disease absence: Kwon Ko, Jae Bum Park, Kyung-Jong Lee, Inchul Jeong; Ann Occup Environ Med 2021;33:e27. Published online August 19, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e27

Abstract PDF Supplementary Material PubReader ePub: Background
Shift work (particularly split shifts) has been noted among the working conditions that hinder sustainable work. However, little is known regarding the effects of split shifts on health. This study aimed to investigate the association between split shift work and work-related injury and disease absence.
Methods
This study used data from the fifth Korean Working Conditions Survey and included 4,042 paid shift workers. Shift work type and self-reported work-related injury and disease absence were investigated using a questionnaire. Logistic regression analysis was performed to investigate the association between split shift work and work-related absence with rotating shift worker as the reference group.
Results
Of the 4,042 shift workers, 980 (24.3%) were split shift workers. The adjusted odds ratio (aOR) of split shift for absence due to work-related injury was high at 2.94 (95% confidence interval [CI]: 1.85–4.68) and the aOR of split shift for absence due to work-related disease was also high at 1.58 (95% CI: 1.09–2.29) compared to rotating shift.
Conclusions
Split shift work leads to an increased risk of absences due to work-related injury and disease.

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Association between change in working time arrangements and sleep disturbance: Ryun Ha, Jae Bum Park, Kyung-Jong Lee, Sunguk Choi, Inchul Jeong; Ann Occup Environ Med 2020;32:e18. Published online June 18, 2020; DOI: https://doi.org/10.35371/aoem.2020.32.e18

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Background

Change in working time arrangement (WTA) can be harmful to workers' sleep and health. This study aimed to investigate the association between change in working time arrangement and sleep disturbance.

Methods

This study used data from the Fifth Korean Working Condition Survey and included 33,203 paid workers. We performed a stratified analysis by sex. After dividing the participants into 6 groups based on whether or not they experienced WTA changes, and their weekly working hours (≤40, 41–52, ≥53 hours), we calculated odds ratio (OR) using the weekly working hours ≤40 hours and with no WTA change as the reference group.

Results

Of the 33,203 paid workers, participants who experienced change in working time arrangement had higher prevalence of all three types of sleep disturbance symptoms (difficulty in falling asleep, waking up repeatedly during sleep, and waking up with a feeling of exhaustion and fatigue) in both sexes. Compared to the reference group at 95% confidence interval (CI), the group with change in WTA showed elevated OR values of 1.91 (95% CI: 1.73–2.11), 1.93 (95% CI: 1.74–2.14), 2.47 (95% CI: 2.26–2.71) for male workers; and 1.93 (95% CI: 1.73–2.16), 2.02 (95% CI: 1.80–2.27), 2.24 (95% CI: 2.01–2.50) for female workers, for difficulty in falling asleep, waking up repeatedly during the sleep, waking up with a feeling of exhaustion, and fatigue, respectively.

Conclusions

Workers who experience change in work time arrangement show a high risk of sleep disturbance in both sexes.

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Diversity of flexible working time arrangements and workers' health: An analysis of a workers’ panel and linked employer-employee data for France
Christine Erhel, Mathilde Guergoat-Larivière, Malo Mofakhami
Social Science & Medicine.2024; 356: 117129. CrossRef

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Combined effect of emotional labor and job insecurity on sleep disturbance among customer service workers: Sunguk Choi, Kwon Ko, Jae Bum Park, Kyung-Jong Lee, Seungho Lee, Inchul Jeong; Ann Occup Environ Med 2020;32:e33. Published online September 10, 2020; DOI: https://doi.org/10.35371/aoem.2020.32.e33

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Background

Job insecurity and emotional labor are poor job-related factors that are known to cause sleep disturbances in customer service workers. This study investigates the combined effect of emotional labor and job insecurity on sleep disturbance.

Methods

This study used data from the Fifth Korean Working Condition Survey and included 15,147 paid workers who serve customers below 65 years. We re-classified into 6 groups based on whether the degree of emotional labor increased (Rarely/Sometimes/Always) or whether job insecurity (No/Yes) was present. We performed propensity score matching for several covariates and calculated odds ratio (OR) and 95% confidence intervals (CIs) for sleep disturbance by logistic regression models using only matched subjects.

Results

Workers exposed to emotional labor and job insecurity had significantly higher risk for 3 dimensions of sleep disturbance (difficulty falling asleep, waking up repeatedly during the sleep, and waking up with feeling of fatigue) (OR [95% CI]: 1.44 [1.22–1.69], 1.18 [0.99–1.40], 1.52 [1.30–1.79] for emotional labor; and 2.00 [1.75–2.29], 2.20 [1.91–2.53], 1.67 [1.45–1.92] for job insecurity). Compared to those who were exposed to both emotional labor rarely and without job insecurity, when workers had both poor job factors, the OR (95% CI) for sleep disturbance for difficulty falling asleep, waking up repeatedly during the sleep, and waking up with feeling of fatigue were 3.05 (2.42–3.86), 2.89 (2.26–3.69), and 2.60 (2.06–3.29), respectively. The relative excess risk due to Interaction of job insecurity and emotional labor was significant only for difficulty falling asleep, but not the other 2 sleep disturbance dimensions.

Conclusions

Customer service workers suffered from severe sleep disturbances according to the existing degree of emotional labor and job insecurity. The combined effect of both could have an additive influence on serious sleep disturbance among customer service workers.

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Associations between precarious employment and smoking and regular exercise: Results from a Korean longitudinal panel study from 2005 to 2020
Seong-Uk Baek, Jin-Ha Yoon, Jong-Uk Won
Preventive Medicine.2023; 168: 107420. CrossRef
Association between high emotional demand at work, burnout symptoms, and sleep disturbance among Korean workers: a cross-sectional mediation analysis
Seong-Uk Baek, Jin-Ha Yoon, Jong-Uk Won
Scientific Reports.2023;[Epub] CrossRef
Association between Precarious Employment and Smoking and Regular Exercise: Results from Nationally Representative Surveys from 2005 to 2020
Seong-Uk Baek, Jin-Ha Yoon, Jong-Uk Won
SSRN Electronic Journal .2022;[Epub] CrossRef
Association between Workers’ Anxiety over Technological Automation and Sleep Disturbance: Results from a Nationally Representative Survey
Seong-Uk Baek, Jin-Ha Yoon, Jong-Uk Won
International Journal of Environmental Research and Public Health.2022; 19(16): 10051. CrossRef
The Importance of an Emotional Expression Guide to Prevent Work-Related Health Problems in Emotional Laborers
Ji Sun Ha, Jin Ah Kim
International Journal of Environmental Research and Public Health.2021; 18(13): 6710. CrossRef
What Are the Experiences of Emotional Labor and Workplace Violence that Are More Harmful to Health in Korean Workforce?
Won Ju Hwang, Hye Kyung Yang, Ji Hye Kim
International Journal of Environmental Research and Public Health.2020; 17(21): 8019. CrossRef

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The association between dependent self-employment and self-reported depression/anxiety and sleep disorder in South Korea: Guyeon Won, Jae Bum Park, Kyung-Jong Lee, Ryun Ha, Seungho Lee, Inchul Jeong; Ann Occup Environ Med 2019;31:e13. Published online July 29, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e13

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Background

Dependent self-employment is precarious employment, which can be vulnerable to mental health problems. This study aimed to investigate the association of dependent self-employment with depression, anxiety, and sleep disorder in South Korea.

Methods

This study used data from the Fourth Korean Working Conditions Survey and included 32,691 paid workers. Dependent self-employment and self-reported depression/anxiety, and sleep disorder were investigated using a questionnaire. Logistic regression analysis was performed to investigate the association between dependent self-employment and mental health problems.

Results

Of the 32,691 paid workers, 2,371 (7.3%) were dependent self-employed workers. The odds ratio (OR) of dependent self-employment for self-reported depression/anxiety was 1.78 (95% confidence interval [CI]: 1.29–2.45) and the OR of dependent self-employment for self-reported sleep disorder was 1.26 (95% CI: 1.01–1.59) compared to other paid workers.

Conclusions

Dependent self-employment is related to an increased risk of self-reported depression/anxiety and sleep disorder in South Korea.

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Association between precarious employment and the onset of depressive symptoms in men and women: a 13-year longitudinal analysis in Korea (2009–2022)
Seong-Uk Baek, Jong-Uk Won, Yu-Min Lee, Jin-Ha Yoon
Epidemiology and Psychiatric Sciences.2024;[Epub] CrossRef
Gender differences in the prevalence of and trends in sleep patterns and prescription medications for insomnia among US adults, 2005 to 2018
Lei Zuo, Xia Chen, Mingliang Liu, Shan Dong, Li Chen, Guangzhen Li, Zhiyu Zhai, Long Zhou, Haiyan Chen, Yuan Wei, Liping Shi, Guang Hao
Sleep Health.2022; 8(6): 691. CrossRef
How Does the Involuntary Choice of Self-Employment Affect Subjective Well-Being in Small-Sized Business Workers? A Cross-Sectional Study from the Fifth Korean Working Conditions Survey
SangJin Park, Chulyong Park, Joo Hyun Sung
International Journal of Environmental Research and Public Health.2022; 19(2): 1011. CrossRef
Mental health symptoms among dependent contractors in Korea: a cross-sectional study based on the Fifth Korean Working Condition Survey
Seong-Uk Baek, Sung-Shil Lim, Sehyun Yun, Won-Tae Lee, Min-Seok Kim, Jin-Ha Yoon, Jong-Uk Won
Annals of Occupational and Environmental Medicine.2022;[Epub] CrossRef
The relationship between job precariousness and student burnout: a serial indirect effects model
Peter A. Creed, Michelle Hood, Eva Selenko, Shi Hu, Louella Bagley
Journal of Education and Work.2022; 35(8): 843. CrossRef
High Emotional Demands at Work and Poor Mental Health in Client-Facing Workers
Chunhui Suh, Laura Punnett
International Journal of Environmental Research and Public Health.2022; 19(12): 7530. CrossRef
Associations of socioeconomic status and sleep disorder with depression among US adults
Wenzhen Li, Wenyu Ruan, Ying Peng, Zuxun Lu, Dongming Wang
Journal of Affective Disorders.2021; 295: 21. CrossRef

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The association between Korean employed workers’ on-call work and health problems, injuries: Chulin Baek, Jae Bum Park, Kyungjong Lee, Jaehyuk Jung; Ann Occup Environ Med 2018;30:19. Published online March 20, 2018; DOI: https://doi.org/10.1186/s40557-018-0225-0

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Background

On-call work is a form of work that requires the person to work at any time during the on-call period. Thus, on-call work is often regarded as one of the most severe stress factors. This study investigates the associations between on-call work and health problems, injuries.

Methods

This study was based on the 3rd Korean Working Conditions Survey. Total of 29,246 employed workers who had been working for at least 1 year were included. Logistic regression analysis was performed to investigate the association between on-call work and health problems, injuries.

Results

The odds ratios for on-call workers in terms of physical health problems, psychological health problems, and injuries were 1.33 (95% confidence interval [CI] 1.22-1.44), 1.31 (95% CI 1.08-1.60), and 2.76 (95% CI 2.26-3.37), respectively. Analysis of the detailed symptoms revealed odds ratios in on-call workers of 2.06 for hearing problems (95% CI 1.63-2.62); 1.71 for skin problems (95% CI 1.38-2.12); 1.22 for back pain (95% CI 1.08-1.38); 1.23 for muscular pains in upper limbs (95% CI 1.12-1.34); 1.27 for muscular pains in lower limbs (95% CI 1.15-1.40); 1.46 for headache, eye fatigue (95% CI 1.32-1.60); 1.37 for abdominal pain (95% CI 1.02-1.85); 1.43 for depression or anxiety disorders (95% CI 1.07-1.93); 1.36 for fatigue (95% CI 1.24-1.49); and 1.41 for insomnia and general sleep difficulties (95% CI 1.13-1.76).

Conclusions

The present study found that on-call work results in an increased risk of health problems and injuries. This study is the result of analyses of broad range of the job spectrum in Korean employed workers; thus, future studies are necessary to determine the effects of on-call work in various job groups.

Citations

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On-call work and depressive mood: A cross-sectional survey among rural migrant workers in China
Qingqing Xu, Liyun Wang, Yiwen Zhang, Xia Jiang
Frontiers in Psychology.2023;[Epub] CrossRef
Changes in the Health Indicators of Hospital Medical Residents During the Four-Year Training Period in Korea
Ji-Sung Ahn, Seunghyeon Cho, Won-Ju Park
Journal of Korean Medical Science.2022;[Epub] CrossRef
Prevalence and risk factors associated with poor sleep among firefighters in Taiwan: An observational study
Cheng-Yao Lin, Shih-Bin Su, Ya-Ting Hu, Cheau-Jane Peng, Kou-Huang Chen, Kow-Tong Chen
Medicine.2022; 101(44): e31570. CrossRef

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Effects of changes in occupational stress on the depressive symptoms of Korean workers in a large company: a longitudinal survey: Jaehyuk Jung, Inchul Jeong, Kyung-Jong Lee, Guyeon Won, Jae Bum Park; Ann Occup Environ Med 2018;30:39. Published online June 8, 2018; DOI: https://doi.org/10.1186/s40557-018-0249-5

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Background

Prospective studies on occupational stress and depression among Korean workers are scarce. This study aimed to investigate the causal relationship between changes in occupational stress and the presence of depression.

Methods

This study analyzed data from a survey conducted with workers in a large Korean company (2015–2016). Occupational stress was measured using the Korean Occupational Stress Scale, and depression was screened using the WHO-5 Well-being Index. The levels of occupational stress were grouped in quartiles based on subjects’ occupational stress scores in 2015, and changes in occupational stress were measured using the score changes between the 2015 and 2016 surveys. Subjects were divided into four groups according to the presence or absence of depression in 2015 and 2016: a non-depressed group whose mental health did not change, a non-depressed group whose mental health deteriorated, a depressed group that continued to be depressed, and a depressed group whose symptoms of depression were alleviated. Logistic regression analysis was used to calculate the odds ratios (ORs) and confidence intervals (CIs) of the subjects’ deterioration in mood or alleviation of depression by occupational stress levels and changes.

Results

The OR for developing depressive symptoms was 2.51 (95% CI 1.46–4.33) and 2.73 (95% CI 1.39–5.36) in the third and the fourth quartiles of occupational stress, respectively, compared to the first quartile. When the occupational stress score increased by 1 point, the OR for increasing depressive symptoms was 1.07 (95% CI 1.04–1.10). There was no significant difference in the alleviation of depressive symptoms between the groups by level of occupational stress. However, when the occupational stress score decreased by 1 point, the OR for alleviating depressive symptoms was 1.08 (95% CI 1.05–1.11).

Conclusion

The results showed that increased occupational stress increased the presence of depressive symptoms, and that reduced occupational stress suppressed the development of depressive symptoms. More attention should be paid to stress management among workers.

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Arbeitszufriedenheit unter österreichischen Pädiaterinnen und Pädiatern
Daniela S. Kohlfürst, Thomas Zöggeler, Daniela Karall, Reinhold Kerbl
Pädiatrie & Pädologie.2024;[Epub] CrossRef
The association of job training duration and risk of depression among wage workers: an analysis of the mediating factors
Dong Geon Kim, Dong Kyu Kim, Kiook Baek
Annals of Occupational and Environmental Medicine.2024;[Epub] CrossRef
An Empirical Study of Job Burnout and Turnover Intentions of Emergency Physicians: Using Positive Psychological Capital as a Mediating Variable
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A study of job stress, suicidal ideation and suicide attempts in display manufacturing workers: a cross-sectional study
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The association between Korean workers’ presenteeism and psychosocial factors within workplaces: Yun-Sik Cho, Jae Bum Park, Kyung-Jong Lee, Kyoung-Bok Min, Chul-In Baek; Ann Occup Environ Med 2016;28:41. Published online September 7, 2016; DOI: https://doi.org/10.1186/s40557-016-0124-1

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Background

Presenteeism, a concept that has recently undergone active study, is the act of attending work while sick. This study investigates the association between presenteeism and various psychosocial factors within workplaces.

Methods

This study analyzed 29246 wage earners from the third Korean Working Conditions Survey (KWCS, 2011) data using the logistic regression analysis to investigate the association between presenteeism and various psychosocial factors within workplaces.

Results

Among the 29246 wage earners, 6347 (21.7 %) showed presenteeism. Those who experienced age discrimination at work (adjusted odds ratio (aOR) 1.77: 95 % CI 1.56–2.00), educational background discrimination (aOR 1.35: 95 % CI 1.22–1.51), regional discrimination (aOR 1.55: 95 % CI 1.31–1.83), sexual discrimination (aOR 1.65: 95 % CI 1.41–1.94), employment type discrimination (aOR 2.13: 95 % CI 1.89–2.40), physical violence (aOR 1.92: 95 % CI 1.45–2.55), sexual harassment (aOR 2.90: 95 % CI 2.01–4.19), job insecurity (aOR 1.36: 95 % CI 1.18–1.56), work–life imbalance (aOR 1.38: 95 % CI 1.29–1.47), low job satisfaction (aOR 2.04: 95 % CI 1.91–2.17), no colleague support (aOR 1.11: 95 % CI 1.02–1.21), job stress (aOR 1.89: 95 % CI 1.76–2.02), emotional labor (aOR 1.50: 95 % CI 1.41–1.60), high work intensity (aOR 1.31: 95 % CI 1.23–1.38), and 3 groups of job strain that are passive group (aOR 1.09: 95 % CI 1.00–1.18), active group (aOR 1.39: 95 % CI 1.28–1.51), and high strain group (aOR 1.35: 95 % CI 1.24–1.46) showed an increased risk of presenteeism compared to their respective counterparts (p < 0.01).

Conclusions

The study results confirmed the association between presenteeism and various psychosocial factors within workplaces. Considering that presenteeism negatively affects productivity and the mental and physical health of individuals, managing various psychosocial factors within workplaces is proposed to reduce presenteeism.

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Association between sickness presenteeism and depressive symptoms: a cross-sectional study using the 6th Korean working conditions survey
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Association between employment status and self-rated health: Korean working conditions survey: Kimin Kwon, Jae Bum Park, Kyung-Jong Lee, Yoon-Sik Cho; Ann Occup Environ Med 2016;28:43. Published online September 8, 2016; DOI: https://doi.org/10.1186/s40557-016-0126-z

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Background

This research was conducted with an aim of determining the association between employment status and self-rated health.

Methods

Using the data from the Third Korean Working Conditions Survey conducted in 2011, We included data from 34,783 respondents, excluding employers, self-employed workers, unpaid family workers, others. Self-rated health was compared according to employment status and a logistic regression analysis was performed.

Results

Among the 34,783 workers, the number of permanent and non-permanent workers was 27,564 (79.2 %) and 7,219 (20.8 %). The risk that the self-rated health of non-permanent workers was poor was 1.20 times higher when both socio-demographic factors, work environment and work hazards were corrected.

Conclusions

In this study, perceived health was found to be worse in the non-permanent workers than permanent workers. Additional research should investigate whether other factors mediate the relationship between employment status and perceived health.

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Na Rae Jeong, Seung Hun Lee, Yun Jin Kim, Jeong Gyu Lee, Yu Hyeon Yi, Yougn Jin Tak, Hye Rim Hwang, Gyu Lee Kim, Sang Yeoub Lee, Young Hye Cho, Eun Ju Park, Young In Lee, Jung In Choi
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The impact of occupational experience on cognitive and physical functional status among older adults in a representative sample of Korean subjects: Jin-young Min, Jae Bum Park, Kyung-jong Lee, Kyoung-bok Min; Ann Occup Environ Med 2015;27:11. Published online March 20, 2015; DOI: https://doi.org/10.1186/s40557-015-0057-0

Abstract PDF PubReader ePub

Objective

This study investigated the impact of occupation on cognitive and physical function within an occupational window of the past 15 years using a nationally representative sample in Korea.

Methods

A total of 4,408 subjects aged 60 and older were selected from the Korean Longitudinal Study of Aging (KLoSA). Functional health was evaluated using the Korean versions of the Mental State Examination (K-MMSE), Instrumental Activities of Daily Living (K-IADL), and Activities of Daily Living (K-ADL) measures.

Results

The prevalence of lower function was higher among women than among men, and employed persons had better cognitive and physical function compared with the retired and unemployed. Longer work duration during the past 15 years significantly and positively affected all measures of function in men, whereas it only improved physical function in women. Manual laborers exhibited improved functional capacity with longer work durations over the past 15 years, although they presented lower functional scores compared with non-manual laborers. There was a curvilinear relationship of work duration with cognitive and physical function among men and manual laborers.

Conclusion

In our population, longer work duration, especially for men and for manual laborers, appears to be a significant contributor to the cognitive and physical function of older people.

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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;26:32-32. Published online October 1, 2014; DOI: https://doi.org/10.1186/s40557-014-0032-1

Abstract PDF PubReader ePub

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.

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Impacts of presenteeism on work-related injury absence and disease absence
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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
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Relationship between Phenylglyoxylic Acid in Urine and Postural Body Sway in Styrene Exposed Workers: Kyung Jong Lee, Jae Bum Park, Keou Weon Lee, Kwang Jin Lim, Kyoo Yup Jang, Cheol Woo Bang; Korean Journal of Occupational and Environmental Medicine 2002;14(4):459-467. Published online December 31, 2002; DOI: https://doi.org/10.35371/kjoem.2002.14.4.459

Abstract PDF

OBJECTIVE: Until now,no effective screening tools have been available for evaluating the neurotoxicity of organic solvents and metals. The aim of this study was to evaluate the usefulness of posturography as a screening tool for the chronic neurotoxicity of organic solvents.
METHOD
36 workers in 4 septic tank manufacturers,who were exposed to styrene over a period of 1 year (exposed group),and 15 hospital volunteer manual workers were examined by posturography.The subjects' physical,medical,and occupational characteristics were obtained by means of a physical examination and a questionnaire. We excluded from both groups those persons who had psychiatric problems, diabetes, neurologic symptoms, gait disturbance,or a history of stroke.The sway area of the exposed group was compared to that of the non-exposed group using bivariate and multiple regression analysis. We controlled a number of variables including age, alcohol consumption,smoking, weight, height, and body mass index.
RESULT
The sway area of the exposed group was found to be higher than that of the non-exposed group after taking into consideration the effects of other characteristics by means of multiple regression analysis.
CONCLUSION
We concluded the posturography would be an effective tool for the screening of chronic neurotoxicity in workers exposed to styrene.

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Evaluation of the Suitability of Establishing Biological Exposure Indices of Styrene
Ah-rum Choi, Sung-guk Im, Mi-young Lee, Se-Hoon Lee
Safety and Health at Work.2019; 10(1): 103. CrossRef

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The Association of Exposure to Organic Solvents with Liver Function: Chi Young Ann, Kyung Jong Lee, Jae Bum Park, Jae Yeon Jang, Moon Jong Kim; Korean Journal of Occupational and Environmental Medicine 2001;13(1):64-74. Published online March 31, 2001; DOI: https://doi.org/10.35371/kjoem.2001.13.1.64

Abstract PDF

OBJECTIVES
This study was conducted to evaluate the association of cumulative exposure to organic solvent with liver function.
METHODS
We conducted a cross sectional study. 461 male workers who perform painting job at a shipyard and use organic solvents routinely and 125 workers of the same shipyard who never have been exposed to organic solvents were studied. All subjects who were confirmed not having HBsAg surveyed their age, BMI(body mass index), alcohol drinking and smoking history, and examined liver function test (SGOT, SGPT, gamma-GTP, Total protein, albumin, total bilirubin, direct bilirubin). The amount of cumulative exposure (CE) to mixed organic solvents were measured by biological monitoring method using their metabolites in urine.
RESULTS
The CE was observed as a significant variable with logistic regression analysis on abnormality of SGOT(>35IU/L), SGPT(>40IU/L) and gamma-GTP(>63IU/L), their odds ratio were 1.10 (95 %CI, 1.02-1.20), 1.10 (95 %CI, 1.01-1.19), and 1.10 (95 %CI, 1.01-1.19) each.
CONCLUSIONS
Therefore we suggest that the cumulative exposure to mixed organic solvents might be a significant variable on abnormal liver function indices (SGOT, SGPT,gamma-GTP) in male shipyard workers

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Liver function alterations among workers in the shoe industry due to combined low-level exposure to organic solvents
Nina Umicevic, Jelena Kotur-Stevuljevic, Vesna Paleksic, Danijela Djukic-Cosic, Evica Antonijevic Miljakovic, Aleksandra Buha Djordjevic, Marijana Curcic, Zorica Bulat, Biljana Antonijevic
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Estimating Benzene Exposure Level over Time and by Industry Type through a Review of Literature on Korea
Donguk Park, Sangjun Choi, Kwonchul Ha, Hyejung Jung, Chungsik Yoon, Dong-Hee Koh, Seunghun Ryu, Soogeun Kim, Dongmug Kang, Kyemook Yoo
Safety and Health at Work.2015; 6(3): 174. CrossRef
The effect of exposure to a mixture of organic solvents on liver enzymes in an auto manufacturing plant
Saber Mohammadi, Amirhoushang Mehrparvar, Yasser Labbafinejad, Mir Saeed Attarchi
Journal of Public Health.2010; 18(6): 553. CrossRef

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Reactive Airways Dysfunction Syndrome (RADS) Due to Chlorine Gas Exposure: Kyung Jong Lee, Yi Hyeong Lee, Jae Bum Park, Kwang Ho Kim, Ho Keun Chung; Korean Journal of Occupational and Environmental Medicine 1997;9(1):12-16. Published online February 28, 1997; DOI: https://doi.org/10.35371/kjoem.1997.9.1.12

Abstract PDF: Reactive airways dysfunction syndrome (RADS) is a syndrome as a persistent bronchial hyperreactivity with asthmatic dyspnea which occurs after one or more inhalation exposures to a high concentration of irritant gasses, smokes or vapors in subjects who had preciously had no respiratory disease. We report a case of a 34 years old female worker suffering from reactive airways dysfunction syndrome who had been taking charge of guest room cleaning at a condominium. 7 months before, she inhaled high concentration of chlorine gas in confined and poor ventilated working space of bathroom at the condominium. As she was washing a bathroom with a bleaching agent (6 % sodium hypochlorite) without dilution, dyspnea, dizziness, headache, nausea, and coughing developed after work. She still suffer from dyspnea and coughing. All functional tests were normal except for methacholine challenge test which reveals bronchial hyperreactivity. She has some symptoms of dyspnea and coughing when exposed to perfume, cold air, and heavy work.

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