Annals of Occupational and Environmental Medicine

Case Report

A case of extensor pollicis longus (EPL) tendon rupture in an automotive assembly line worker: an ergonomic evaluation through job strain index (JSI) and musculoskeletal risk factor survey: Sunwook Park, Jungwon Kim; Ann Occup Environ Med 2019;31:e2. Published online May 1, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e2

Background

We report a case of extensor pollicis longus (EPL) tendon rupture caused by repetitive motions and awkward posture on hand and wrist joints.

Case presentation

A 47-year-old right-handed man who worked for 15 years in an assembly line at an automotive manufacturing company has been diagnosed with a complete tear of right EPL tendon. We investigated the patient's occupational history in detail and evaluated the tasks ergonomically through musculoskeletal risk factors survey and job strain index (JSI) using the 22 task-related videos recorded by the patient. Three out of the 12 tasks (25%) were identified as high-risk work on the hand and wrist in the musculoskeletal risk factors survey in 2016. Among the 22 tasks analyzed by JSI, 11 tasks (50%) were evaluated as probably hazardous. In addition, he used localized vibration tools in 19 (86.4%) out of 22 tasks.

Conclusion

We concluded the patient's disease was probably caused by repetitive motion and improper posture of the hand and wrist, and the hand-arm vibration is a possible cause as well.

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Erhebung der arbeitsplatzbezogenen subjektiven Belastungs- und Beanspruchungssituation von Akkord- und Fließbandarbeitern im Versandhandel
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Tzu-I Chien, Huey-Wen Liang, Ya-Fen Lee, Fei-Yun Liu, Chi-Kwang Hsu, Shao-Tseng Liu, Mo Siu-Mei Lee, Pin-Fei Wei, Silvia Todros
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Research Article

Effect of maternal job strain during pregnancy on infant neurodevelopment by gender at 6 and 12 months: Mothers and Children’s Environmental Health (MOCEH) study: Eunjeong Kim, HyeSook Park, Yun-Chul Hong, Mina Ha, Yangho Kim, Bo-Eun Lee, Eun-Hee Ha; Ann Occup Environ Med 2015;27:8. Published online March 20, 2015; DOI: https://doi.org/10.1186/s40557-015-0059-y

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Objectives

Limited evidence is available regarding the association between prenatal job strain and infant neurodevelopment. Most studies used stress indicators other than job strain to explain the relationship between prenatal maternal stress and child development. The objective of this study was to investigate the association between maternal job strain during pregnancy and neurodevelopment in infancy.

Methods

Mothers and Children’s Environmental Health (MOCEH) study, an on-going prospective birth cohort study, has been conducted in South Korea since 2006. Job strain during pregnancy was measured using Korean version of Job Content Questionnaire (JCQ). Infant neurodevelopment was assessed using Korean Bayley Scale of Infant Development II (K-BSID-II) at 6 and 12 months of age. A total of 343 mother-child pairs that completed JCQ and K-BSID-II more than once were included. Mental Developmental Index (MDI) and Psychomotor Developmental Index (PDI) defined in the K-BSID-II were used as outcome variables.

Results

Compared to infants from mothers with low job strain, significant (p < 0.05) decreases in PDI were found in infants from mothers with active and passive job at 6 months of age. After stratification by infant sex, boys in the high strain group had a lower MDI score than boys in the low job strain group at 12 months. On the other hand, girls in the high strain and active groups had higher MDI scores than girls in the low job strain group at 12 months. PDI at 12 months also showed different results by sex. Boys in the high strain and passive job groups had lower PDI scores than boys in the low job strain group. However, such difference was not observed in girls.

Conclusions

The findings of this study suggest that prenatal job strain affects infant neurodevelopment in a gender-dependent manner.

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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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Original Article

Occupational Distribution of Job Stress in Korea: Young Su Ju, Young Jun Kwon, Hee Tae Kang, Yong Kyu Kim; Korean Journal of Occupational and Environmental Medicine 2003;15(4):422-435. Published online December 31, 2003; DOI: https://doi.org/10.35371/kjoem.2003.15.4.422

Abstract PDF

OBJECTIVES
Although there is increasing concern about job stress, no published reports have addressed the basic characteristics of job stress (i.e. on various job stress domains), according to the Korean Standard of Job Categories. Therefore, this study was conducted to present epidemiologic data of common Korean workers on job stress domains, by using the self-reported Karasek's Job Content Questionnaire(JCQ.) METHODS: Data were gathered from many workers at various industries for 2 years, as a part of the workers'periodic health examinations, in Kyong-Gi and Kyong-Nam provinces, Korea.
RESULTS
The total respondents were 1,866, male 1,658(88.9%) and female 208(11.1%), from 117 companies. The mean age was 35.05 years old, 1,315(70.4%) were married, 1,578(84.5%) were graduated from high school or above, and 380(20.4%) were managers at workplace. The mean scores of decision latitude, psychological job demand, social support, and job insecurity were 62.56(std 8.28, median 62), 31.45(std 3.83, median 32), 22.49(std 2.58, median 23) and 6.16(std 1.90, median 6), respectively. Construction workers belonged to the high strain group, and administrative managers and computer related experts belonged to the active group.
CONCLUSIONS
To more precisely evaluate job stress according to job categories, data could be gathered from a larger sample and detailed job categories should be adopted. Such a study would form an important foundation for research into job stress in Korea.

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Hyeong-Seong Jin, Dong-Eun Lee
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Do-Young Jung, Eun-Kyung Koh, Jun-Hyeok Jang
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Original Article

Effect of Economic Depression on Psychosocial Distress of Industrial Workers: Bong Suk Cha, Sang Baek Koh, Seung Jun Wang, Sei Jin Chang; Korean Journal of Occupational and Environmental Medicine 1998;10(4):484-492. Published online December 31, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.4.484

Abstract PDF

This study was carried out to assess the effect of economic depression on psychosocial distress, and to assess the relationship between differences of psychosocial distress and job characteristics (job strain), and to find out the effect of social support on psychosocial distress. We measured job characteristics(job demand, job control), and social support(coworker support, supervisor supports) at work by a self-administered questionnaire. Psychosocial distress was measured by PWI(Psychosocial Well-being Index), a 45-item self-administered instrument. Among the 152 respondents, the prevalence of high job strain was 27% (41 persons). The Odds ratio of high job strain was 3.11 (95% CI; 2.12~4.11), and those of passive group and active group were 2.01(95% CI; 0.83~2.76) and 1.80(95% CI; 0.83~2.76), respectively. Our results supported the association between psychosocial distress and job strain. The odds ratio of high strain isolates group (high strain group+low social support) was 3.59 (95% CI; 2.05~5.13), but the odds ratio of high strain collective group was 1.32 (95% CI; 0.23~2.41). Social support at work was modifying factor of the association between psychosocial distress and job strain. Therefore we reviewed the evidence that economic depression was associated with psychosocial distress in this study, and that the strength of the social support was important in maintain health.

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Depressive Symptoms among Industrial Workers in Vietnam and Correlated Factors: A Multi-Site Survey
Bach Xuan Tran, Giang Thu Vu, Kiet Tuan Huy Pham, Quan-Hoang Vuong, Manh-Tung Ho, Thu-Trang Vuong, Hong-Kong T. Nguyen, Cuong Tat Nguyen, Carl A. Latkin, Cyrus S.H. Ho, Roger C.M. Ho
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Original Article

Study on Perceived Occupational Psychosocial Stress and Work-related Musculoskeletal Disorders among VDT Works: Yeong Su Ju, Ho Jang Kwon, Dong Gyu Kim, Jai Yong Kim, Nam Jong Baek, Hong Ryul Choi, In Keun Bae, Jong Man Park, Jong Du Kang, Soo Hun Cho; Korean Journal of Occupational and Environmental Medicine 1998;10(4):463-475. Published online December 31, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.4.463

Abstract PDF

It has been hypothesized that jobs that have both high psychological demands and low decision latitude ('job strain") can lead to musculoskeletal disorder. The objective of this study was to test whether job strain was correlated with the presence of work-related musculoskeletal disorder, especially myofascial pain syndrome (MPS). Information on demographic factors, confounders such as household load and taking care of children or not, and scores for decision latitude, job demand, and social support was obtained by self-administered questionnaire, which had been developed in Korean language, by adopting NIOSH instrument and Extended Karasek Model (16 items). All subjects were also examined by rehabilitation medicine specialists for musculoskeletal disorders. Subjects (n=370) could be categorized into 4 groups, these were, housewives(n=89), shipyard CAD workers(n=89), general female workers(n=79; nurses, insurance counselors, public officials, clerks, etc), and telephone directory assistance operators(n=113). Results from univariate analyses indicated that all demographic factors, all confounders, scores for decision latitude and social support were not associated with the risk of musculoskeletal disorder. However, score for job demand was higher in musculoskeletal disorder cases than others. In subgroup analysis, this association was convinced again, in telephone directory assistance operators. Job strain model showed that the group of telephone directory assistance operators was high-strain group, and OR of musculoskeletal disorder was 2.446 (95% C.I. : 1.174, 5.096), when comparing this with the low strain group. In conclusion, job strain is a risk factor for work-related musculoskeletal disorder.

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