Annals of Occupational and Environmental Medicine

Original Article

A pilot study to assess a risk of a high-risk group of low back pain membership in workers who perform the manual material handling tasks: Sungho Lee, Seongchan Heo, Jong-Young Lee; Ann Occup Environ Med 2021;33:e34. Published online November 17, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e34

Background

We conducted this experimental study to estimate a risk of a high-risk group of low back pain (LBP) membership in workers who perform the manual material handling (MMH) tasks in an actual workplace setting.

Methods

The subjects include healthy workers who were engaged in 12 MMH tasks at 6 manufacturing companies. We assessed the dynamic motion of trunk or lumbar spine using an industrial lumbar motion monitor (BioDynamics Laboratory of Ohio State University). The subjects were evaluated for the age, gender, years of working and anthropometric measurements (e.g., height, weight, shoulder height, elbow height, iliac height, leg length, trunk length, trunk circumference, iliac width, iliac depth, xiphoid width and xiphoid depth). Moreover, they were also evaluated for a risk of a high-risk group of LBP membership based on lift frequency, average twisting velocity, maximum moment, maximum sagittal flexion and maximum lateral velocity.

Results

The subjects who were engaged in a packaging at a detergent manufacturing company are at the greatest risk of LBP (63.76%). This was followed by packaging at a leather product manufacturing company (57.06%), packaging at a non-metallic casting material manufacturing company (57.03%), manual injection at a non-metallic casting material manufacturing company (52.00%), toggling at a leather product manufacturing company (46.09%), non-metallic casting material manufacturing company (42.88%), rolling at a non-metallic mineral product manufacturing company (42.12%), shooting at a non-metallic casting material manufacturing company (40.99%), vacuum processes at a leather product manufacturing company (35.00%), looping at a general industrial machinery manufacturing company (33.93%), setting at a leather product manufacturing company (30.22%) and packaging at a general metal product manufacturing company (22.02%).

Conclusions

Our approach indicates that there is a risk of a high-risk group of LBP membership in workers who perform the MMH tasks.

Citations

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ERGONOMİK RİSK DEĞERLENDİRME YÖNTEMLERİYLE TESPİT EDİLMİŞ FİZİKSEL İŞ YÜKÜ İLE ENERJİ TÜKETİMİNİN DEĞERLENDİRİLMESİ
Emin Kahya, Ceyda Özgen, Nasiba Jorayeva
Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi.2024; 32(2): 1315. CrossRef
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Research Article

Comparison of work environment and occupational injury in direct and indirect employment in Korea and Europe: Joonho Ahn, Seong-Sik Cho, Hyoung-Ryoul Kim, Jun-Pyo Myong, Mo-Yeol Kang; Ann Occup Environ Med 2019;31:e24. Published online September 25, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e24

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Background

To investigate the risk of injury for indirect employment in Korea, we compared work environment, workplace exposure, and injury risk according to the type of employment contract between Korea and European Union (EU) countries.

Methods

We analyzed data of blue-collar workers from the fourth Korean Working Conditions Survey (2014) and the sixth European Working Conditions Survey (2015) and compared workplace risk factors and preventive factors for occupational injuries. Multiple logistic regression analysis was conducted to identify the relationship between occupational injury and the type of employment contract after adjusting for age and sex.

Results

For descriptive characteristics, a relatively older age, lower income, lower proportion of full-time work, greater proportion in small-sized companies, and fewer unionizations were noted in indirect employment in Korea than in direct employment. Workplace exposure was significantly higher in indirect employment in both Korea and Europe. Among safety-related factors, indirect employment in both Korea and Europe lacked the support of company education, coworkers, and supervisors. Indirectly employed blue-collar workers had a significantly higher risk of occupational injury than those directly employed in Korea (odds ratio [OR]: 1.876), whereas there was no significant difference between directly and indirectly employed workers in EU countries (OR: 1.038).

Conclusions

Indirectly employed blue-collar workers have an increased risk of occupational injury in Korea.

Citations

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Estimated trends in hospitalizations due to occupational injuries in Korea based on the Korean National Hospital Discharge In-depth Injury Survey (2006-2019)
Seonguk Baek, Won-Tae Lee, Min-Seok Kim, Myeong-Hun Lim, Jin-Ha Yoon
Epidemiology and Health.2023; : e2023042. CrossRef
Teleworking Is Significantly Associated with Anxiety Symptoms and Sleep Disturbances among Paid Workers in the COVID-19 Era
Minji Kim, Inho Park, Hyojin An, Byungyoon Yun, Jin-Ha Yoon
International Journal of Environmental Research and Public Health.2023; 20(2): 1488. CrossRef
Economic costs and Predictors of occupation-related Injuries in Ethiopian sugar industries from the Employer’s perspective: top-down approach and friction method
Mitiku Bonsa Debela, Muluken Azage, Negussie Deyessa, Achenef Motbainor Begosaw
BMC Public Health.2022;[Epub] CrossRef
Association between physical risk factors and sleep disturbance among workers in Korea: The 5th Korean Working Conditions Survey
Inho Park, Seunghan Kim, Yangwook Kim, Byungyoon Yun, Jin-Ha Yoon
Sleep Medicine.2022; 100: 157. CrossRef
Comparative analyses of occupational injuries among temporary agency worker and direct contract workers: Findings from the Korea Health Panel 2009–2018
Joonho Ahn, Jongin Lee, Hyoung-Ryoul Kim, Yu Min Lee, Tae-Won Jang, Dong-Wook Lee, Mo-Yeol Kang
Journal of Occupational Health.2022;[Epub] CrossRef
Inequalities in External-Cause Mortality in 2018 across Industries in Republic of Korea
Jiyoung Lim, Kwon Ko, Kyung Eun Lee, Jae Bum Park, Seungho Lee, Inchul Jeong
Safety and Health at Work.2022; 13(1): 117. CrossRef
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Joonho Ahn, So-Jung Ryu, Jihun Song, Hyoung-Ryoul Kim
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The Occupational Characteristics and Health Status of Workers in Geographically Isolated and Confined Areas in the Republic of Korea
Joonho Ahn, Jongin Lee, Sang Ha Lee, Min Young Park, Wanhyung Lee
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Research Article

Association between depression and cardiovascular disease risk in general population of Korea: results from the Korea National Health and Nutrition Examination Survey, 2016: Jinho Song, Tae Hwan Koh, One Park, Daeil Kwon, Seonghoon Kang, Kyeongmin Kwak, Jong-Tae Park; Ann Occup Environ Med 2019;31:e10. Published online June 20, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e10

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Background

Depression is considered as a risk factor for cardiovascular disease (CVD) and associated with changes in individuals' health status that might influence CVD risk. However, most studies have scrutinized this relationship on a rather narrower and specific study population. By focusing on general population of Korea, we sought to inspect the association of depression with CVD risk and cardiovascular risk factors.

Methods

The data from the first year (2016) of the 7th Korea National Health and Nutrition Examination Survey was used. Participants were classified by the Patient Health Questionnaire-9 (PHQ-9) score as such: normal group (PHQ-9 score 0–4), mild depression (MD) group (PHQ-9 score 5–9) and moderate and severe depression (MSD) group (PHQ-9 score 10–27). General linear model was used to analyze differences and the trend of mean CVD risk according to depression level. Adjusted odds ratios (AORs) were calculated by logistic regression to identify the association between depression and cardiovascular risk factors after adjusting for age.

Results

Mean CVD risk of MSD group was higher than that of normal group (p < 0.05). There was a tendency of CVD risk to increase as depression worsened (p < 0.01). Among men, MSD group was associated with current smoking (AOR, 2.97; 95% confidence interval [CI], 1.78–4.97), taking antihypertensive medications (AOR, 2.42; 95% CI, 1.26–4.66), increased fasting blood sugar (> 125 mg/dL; AOR, 2.37; 95% CI, 1.25–4.50) and taking diabetes medications (AOR, 3.08; 95% CI, 1.65–5.72). MD group was associated with current smoking (AOR, 1.60; 95% CI, 1.18–2.17). Among women, MSD group was associated with high body mass index (≥ 25 kg/m²; AOR, 1.61; 95% CI, 1.11–2.32), large waist circumference (≥ 85 cm; AOR, 1.63; 95% CI, 1.12–2.37), current smoking (AOR, 5.11; 95% CI, 3.07–8.52) and taking diabetes medications (AOR, 2.62; 95% CI, 1.68–4.08). MD group was associated with current smoking (AOR, 1.86; 95% CI, 1.18–2.93).

Conclusions

We suggest that depression is associated with increased risk for CVD occurrence in general population of Korea.

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Research Article

Relationship between simultaneous exposure to ergonomic risk factors and work-related lower back pain: a cross-sectional study based on the fourth Korean working conditions survey: Jae-Yeop Kim, Ji-Su Shin, Myeong-Seob Lim, Hyeon-Gyeong Choi, Sung-Kyeong Kim, Hee-Tae Kang, Sang-Baek Koh, Sung-Soo Oh; Ann Occup Environ Med 2018;30:58. Published online September 5, 2018; DOI: https://doi.org/10.1186/s40557-018-0269-1

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Background

It is well known that ergonomic risk factors and back pain are related. However, few studies have examined the relationship between simultaneous exposure to these risk factors and back pain in a Korean population. We aimed to investigate the relationship between simultaneous exposure to ergonomic risk factors and work-related lower back pain (LBP) based on the fourth Korean Working Conditions Survey (KWCS).

Method

The fourth KWCS (2014) was used for this study. Chi-square tests and logistic regression were used to assess relationship between 5 ergonomic risk factors and work-related LBP. We also analyzed the relationship between simultaneous exposure to 2 risk factors and work-related LBP.

Results

All 5 ergonomic risk factors (fatigue-inducing and painful posture; lifting or moving people; dragging, pushing, or moving heavy objects; standing posture; and repetitive hand or arm movements) were significantly correlated with work-related LBP in the severe exposure group (adjusted odd ratios [aOR] 5.09, 95% confidence interval [CI] 4.46–5.83; aOR 1.98, 95% CI 1.62–2.42; aOR 2.09, 95% CI 1.82–2.40; aOR 1.79, 95% CI 1.60–2.01; aOR 2.04, 95% CI 1.82–2.30, respectively). When exposed to 2 risk factors simultaneously, the relationship between exposure and work-related LBP was not greater than exposure to only 1 risk factor in our study (usually exposed to ‘fatigue-inducing or painful posture’ aOR 2.17, 95% CI 2.02–2.34; high exposure to both ‘fatigue-inducing or painful posture’ and ‘dragging, pushing, or moving heavy objects’ aOR 2.00, 95% CI 1.82–2.20).

Conclusions

There was a strong relationship between severe exposure to each ergonomic risk factor and work-related LBP. However, when exposed to 2 ergonomic risk factors simultaneously, the relationship between exposure and work-related LBP was not stronger than when exposed to only 1 risk factor in our study.

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A pilot study to assess a risk of a high-risk group of low back pain membership in workers who perform the manual material handling tasks
Sungho Lee, Seongchan Heo, Jong-Young Lee
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Research Article

Factors related to heart rate variability among firefighters: Jae-Hong Shin, Jung-Youb Lee, Seon-Hee Yang, Mi-Young Lee, In-Sung Chung; Ann Occup Environ Med 2016;28:25. Published online June 13, 2016; DOI: https://doi.org/10.1186/s40557-016-0111-6

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Objectives

The aim of this study was to investigate factors associated with heart rate variability in firefighters working in a metropolitan city in South Korea.

Methods

Self-administered questionnaires including Korean Occupational Stress Scale (KOSS) as well as surveys collecting socio-demographic characteristics and work-related factors were given to 962 firefighters. After exclusion for missing data, 645 firefighters were included, and analysis of covaiance adjusted for the general risk factors and job characteristics were used to assess the relationship between heart rate variability and associated factors.

Results

SDNN and RMSSD and were decreased in the area of occupational climate of the group with high job stress (p = 0.027, p = 0.036). HF(ln) was decreased in the area of organizational system and occupational climate of the group with high stress that statistically significant level (p = 0.034, p = 0.043).

Conclusions

Occupational climate and organizational system are associated with reduction of heart rate variability. Preventive medical care plans for cardiovascular disease of firefighters through the analysis and evaluation of job stress factors are needed.

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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;26:23-23. Published online August 9, 2014; DOI: https://doi.org/10.1186/s40557-014-0023-2

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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

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;26:11-11. Published online May 22, 2014; DOI: https://doi.org/10.1186/2052-4374-26-11

Abstract PDF PubReader ePub

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.

Citations

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Research Article

Association between Workplace Risk Factor Exposure and Sleep Disturbance: Analysis of the 2nd Korean Working Conditions Survey: Yong-Seok Heo, Sei-Jin Chang, Shin-Goo Park, Jong-Han Leem, Sung-Hwan Jeon, Bum-Joon Lee, Kyung-Yong Rhee, Hwan-Cheol Kim; Ann Occup Environ Med 2013;25:41-41. Published online December 27, 2013; DOI: https://doi.org/10.1186/2052-4374-25-41

Abstract PDF PubReader ePub

Objectives

Sleep is essential for human beings to live and work properly. This study was conducted to investigate the relationship between occupational exposures to workplace risk factors and sleep disturbance in Korean workers.

Methods

The data were drawn from the second Korean Working Conditions Survey (KWCS); a total of 7,112 paid workers were analyzed. The independent variables were occupational exposures such as physical, chemical, biological, and psychosocial risk factor in the workplace, and psychosocial risk factor was divided into five categories (job demand, job control, social support, job insecurity, lack of reward). We estimated the relationship between various occupational exposures and sleep disturbance using multivariate logistic regression analysis.

Results

The results showed that people who exposed to physical, chemical, biological, and psychosocial (high job demand, inadequate social support, lack of reward) risk factors were more likely to increase the risk of sleep disturbance. Furthermore, after adjusting for general and occupational characteristics, we found significant positive associations between exposures to physical (odds ratios [OR] 1.47, 95% confidence interval [CI] 1.05-2.07) and psychosocial (high job demand (OR 2.93, 95% CI 2.16-3.98), inadequate social support (OR 1.57, 95% CI 1.14-2.15), lack of reward (OR 1.45, 95% CI 1.08-1.96)) risk factors and sleep disturbance.

Conclusion

These results suggest that occupational exposures to physical and psychosocial workplace risk factors are significantly related to sleep disturbance.

Citations

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Research Article

The Relationship between Waist Circumference and Work-related Injury in Reference to the Fourth Korea National Health and Nutrition Examination Survey: Sung-Kyung Kim, Ji-Min Son, Jae-Young So, Hyocher Kim, Kyungsuk Lee, Sung-Soo Oh, Sang Baek Ko; Ann Occup Environ Med 2013;25:29-29. Published online November 1, 2013; DOI: https://doi.org/10.1186/2052-4374-25-29

Abstract PDF PubReader ePub

Objective

This study aims to investigate the relationship between waist circumference and work-related injury in reference to the fourth Korea National Health and Nutrition Examination Survey.

Methods

By analyzing data from the fourth Korea National Health and Nutrition Examination Survey conducted from 2007 to 2009, we estimated the rate of injury experience according to socioeconomic status, including occupational property, of 8,261 subjects. We performed logistic regression analysis with work-related injury experience rate as dependent variable and waist circumference as an independent variable, Odds ratios (OR) were calculated, which reflect the likelihood of work-related injury experience rate, and 95% confidence interval (95% CI) while controlling for relevant covariates with stratifying by sex, age, nature of injury, site of injury and occupational group.

Results

Among 797 persons who had injury experience over the past 1 year, 293 persons (36.8%) had work-related injury experience. After adjusting the confounding variables, the work-related injury was related to abnormal waist circumference (OR = 1.35; 95% CI: 1.02 ~ 1.78). In subgroups, ORs were higher in men (OR = 1.42; 95% CI: 1.02 ~ 1.98), professional, manager, and administrator (OR = 2.41; 95% CI: 1.10 ~ 5.28). Higher rate of injuries were noted in back and waist (OR = 2.92; 95% CI: 1.49 ~ 5.73), and transport accident had increased risk (OR = 1.60; 95% CI: 1.13 ~ 2.28).

Conclusions

Work-related injury rate differed depending on the waist circumference. The abdominal obesity was associated with higher risk of work-related injury. This study would be useful in selecting appropriate priorities for work-related injury management in Korea.

Citations

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Work–life prevalence of self-reported occupational injuries in mothers of a birth cohort
Joana Amaro, Ana Catarina Queiroga, João Amaro, Ingrid Sivesind Mehlum, Raquel Lucas
International Journal of Occupational Safety and Ergonomics.2022; 28(2): 798. CrossRef

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Original Article

The Relationship of Serum Vitamin D Levels and the Framingham Risk Score among Male Workers in the Manufacturing Sector: Seung Hyun Park, Young Wook Kim, Chang Ho Chae, Jun Seok Son, Chan Woo Kim, Jae Youn Kim, Ja Hyun Kim; Korean Journal of Occupational and Environmental Medicine 2012;24(2):115-123. Published online June 30, 2012; DOI: https://doi.org/10.35371/kjoem.2012.24.2.115

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