The purpose of this study is to investigate the relationship between the work postures and upper extremity cumulative trauma disorders(CTDs) in female medical insurance bill reviewers(n=448). This study included diagnosis for CTDs, anthropometry and job analysis (workstations and posture). The characteristics of subject were 33.6 years of average age and 8.7 years of average work duration. The results were as follows.
Ergonomic conditions of workstation were unsuitable compared with anthropometry result. The height of work surface(79.5 ㎝) and chair(43.0 ㎝)were high, work space was small, and legs space under the table was limited.
Work postures were awkward compared with recommended neutral postures. Neck flexion(21.0-36.0 ), elbow elevation, shoulder abduction (46.0-47.0 ), wrist radial and ulnar deviation, forearm supination and pronation, and wrist repeated motion(12.7-21.5 freq./min) were analyzed as hazardous risk factors by job analysis.
The prevalence of CTDs was 32.8 % by medical diagnosis. The prevalence rate of CTDs in hazardous work posture group was significantly greater than safe work posture group both neck-shoulder (relative prevalence = 5.2, p$lt;0.001) and wrist-hand (relative prevalence = 2.5, p$lt;0.05).
|