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KMID : 0358520080200020093
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Korean Journal of Occupational and Environmental Medicine
2008 Volume.20 No. 2 p.93 ~ p.103
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Musculo-skeletal Symptoms of Municipal Sanitation Worksers and Ergonomic Evaluation on Upperlimb
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Myeon Jun-Pyo
Jung Hye-Sun
Koo Jung-Wan
Lee Hyang-Ki
Kim Hyoung-Ryoul
Jeong Eun-Hee
Nam Woong
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Abstract
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Objectives: The aim of this study was to estimate musculo-skeletal symtoms of municipal sanitation workers and to evaluate working conditions of municipal sanitation workers to search for the factors related to musculo-skeletal symptoms.
Methods: We conducted a descriptive cross-sectional survey. The study subjects were comprised of 543 municipal sanitation workers in some divisions of Seoul and the Gyeonggi province. Musculo-skeletal analysis was done by using the modified criteria of NIOSH musuclo-skeletal symptoms, RULA and, REBA. Statistical analysis was done by using the chi-square test, multiple logistic regression analysis.
Results: 72.2% of the subjects complained musculo-skeletal symptoms (39.6% on the upperlimbs, 30.0% on the lumbar region, 27.4% on the legs). For the musculo-skeletal symptoms criteria (1~3), street cleaners complained of more musculo-skeletal symptoms than the solid waste collectors, after classifying the jobs of sanitation workers. On logistic regression analysis of the musculo-skeletal "symptoms criteria1" positive groups, age was related to the criteria positive (prevalence odds ratio=1.018, 95% CI: 0.993-1.046). The worktime was significantly related to ’criteria positive 1 and, 2’ (prevalence odds ratio=2.165 (95% CI: 1.156-4.131), 2.187 times (95% CI: 1.071-4.651)). The RULA score, the subtotal A score of RULA, the REBA score and , the total A REBA score of the upperlimbs of solid waste collectors were higher than those of the street cleaners.
Conclusion: In spite of the lower ergonomic evaluation score of the street cleaner, the street cleaners complained of more musculo-skeletal symptoms than did the solid waste collectors due to more frequent repetitive motions, a longer work time (over 10 hours) etc. It is suggested that the sanitation workers need to use the proper methods to avoid musculo-skeletal disease.
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KEYWORD
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Task performance and analysis, Ergonomics, Municipal sanitation workers, Musculoskeletal symptoms, Upper extremity
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