The Relationship between Musculoskeletal Symptoms and Job Stress & Intensity of Labor among Shipbuilding Workers

Inah Kim; Sang Baek Koh; Jeong Soo Kim; Dong Mug Kang; Mia Son; Yongkyu Kim; Jaechul Song

doi:10.35371/kjoem.2004.16.4.401

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Original Article The Relationship between Musculoskeletal Symptoms and Job Stress & Intensity of Labor among Shipbuilding Workers: Inah Kim, Sang Baek Koh, Jeong Soo Kim, Dong Mug Kang, Mia Son, Yongkyu Kim, Jaechul Song; DOI: https://doi.org/10.35371/kjoem.2004.16.4.401
Published online: December 31, 2004

¹Department of Occupational and Environmental Medicine, College of Medicine, Hanyang University, Korea. ptdoctor@hanmail.net

²Department of Preventive Medicine and Institute of Occupational Medicine, Wonju College of Medicine, Yonsei University, Korea.

³Department of Preventive Medicine, College of Medicine, Seoul National University, Korea.

⁴Department of Preventive and Occupational Medicine, College of Medicine, Pusan National University, Korea.

⁵Department of Preventive Medicine, College of Medicine, Kangwon National University, Korea.

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Abstract

OBJECTIVES
This study aimed to reveal the multiple factors that are related to the work-related musculoskeletal disorders (WMSDs) of shipbuilding workers, and to elucidate the relationship between musculoskeletal symptoms and factors such as the change of working conditions, job stress and physical workload.
METHODS
The study sample comprised 1,059 shipbuilding workers. A structured-questionnaire was used to assess the general characteristics, job stress, psychosocial well-being index (PWI), physical workload, change of working conditions and information concerning musculoskeletal symptoms. We estimated the relations of job stress, physical workload and intensity of labour to musculoskeletal symptoms using univariate and multiple logistic regression analyses.
RESULTS
The symptom prevalence of musculoskeletal disorders in any part of the body was 89.5% by 'criteria 1'in the order of back (58.6%) and shoulder (56.3%). After adjustment for sociodemographic factors, posture factor (Odds ratio [OR]=1.06, 95% confidence interval [ C I ] = 1 . 0 0~1.12), non-posture factor (OR=1.17, CI=1.05~1.31), Borg scale (OR=1.15, C I = 1 . 0 0~1.32), relative work intensity increase (OR=1.92, CI=1.08~3.41), labor flexibility increase (OR=2.04, CI=1.04~4.01), high job demand (OR=2.68, CI=1.48~4.88), and high risk stress group (OR=13.50, CI=3.15~57.97) were all found to be significantly associated with musculoskeletal disorders.
CONCLUSION
These results suggest that WMSDs have multiple risk factors such as stress, physical workload and change of working conditions. High job demand, increased relative intensification of work and increased flexibility, especially such as subcontract, outsourcing and importing of contingent work, were very important factors associated with increasing WMSDs.

Keywords: Musculoskeletal symptom;Job stress;Work organization;Intensity of labor;Shipbuilding

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