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ISSN : 1229-6783(Print)
ISSN : 2288-1484(Online)
Journal of the Korea Safety Management & Science Vol.16 No.1 pp.119-127
DOI : https://doi.org/10.12812/ksms.2014.16.1.119

작업관련성 근골격계질환에 있어서 작업자세 위험도의 정량적
평가방법에 대한 연구
-허리 굴곡 자세를 중심으로-

박 동 현*, 노 안 나*, 최 서 연**
*인하대학교 산업공학과,
**인하대학교 대학원 의학과

A Study on Quantitative Evaluation Method for Risk of Work-related Musculoskeletal Disorders Associated with Back Flexion Posture

Dong Hyun Park*, An Na Noh*, Seo Yeon Choi**
*Dept. of Industrial Engineering, Inha University
**Dept. of Social & Preventive Medicine, Inha University
Received January 20, 2014; Revision Received March 11, 2014; Accepted March 17, 2014.

Abstract

This study tried to develop a basis for quantitative index of working postures associated with WMSDs(Work-related Musculoskeletal Disorders) that could overcome realistic restriction during application of typicalchecklists for WMSDs evaluation. The baseline data(for a total of 603 jbs) for this study was obtained fromautomobile manufacturing company. Specifically, data for back posture was analyzed in this study to have abetter and more objective method in terms of job relevance than typical methods such as OWAS, RULA, andREBA. Major statistical tools were clustering, logistic regression and so on. The main results in this studycould be summarized as follows; 1) The relationship between working posture and WMSDs symptom at backwas statistically significant based on the results from logistic regression, 2) Based on clustering analysis, threelevels for WMSDs risk at back were produced for flexion as follows: low risk(< 18.5°), medium risk(18.5°~36.0°), high risk(> 36.0°), 3) The sensitivities on risk levels of back flexion was 93.8% while the specificities onrisk levels of back flexion was 99.1%. The results showed that the data associated with back postures in thisstudy could provide a good basis for job evaluation of WMSDs at back. Specifically, this evaluationmethodology was different from the methods usually used at WMSDs study since it tried to be based on directjob relevance from real working situation. Further evaluation for other body parts as well as back wouldprovide more stability and reliability in WMSDs evaluation study.

 

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