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Korean Journal of Preventive Medicine 1999;32(3): 361-373.
Development of Work-related Musculoskeletal Disorder Questionnaire Using Receiver Operating Characteristic Analysis.
Jaiyong Kim, Ho Jang Kwon, Yeongsu Ju, Soo Hun Cho, Daehee Kang, Joohon Sung, Seong Woo Choi, Jae Wook Choi, Jae Young Kim, Don Gyu Kim
1Department of Preventive Medicine, Seoul National University College of Medicine & Institite of Environmental Medicine, SNUMRC, Korea.
2Department of Preventive Medicine, Dankuk University College of Medicine, Korea.
3Department of Preventive Medicine, Korea University College of Medicine, Korea.
4Seo-Gui-Po City Health Center, Korea.
OBJECTIVES: Receive Operating Characteristic(ROC) curve with the area under the ROC curve(AUC) is one of the most popular indicator to evaluate the criterion validity of the measurement tool. This study was conducted to develop a standardized questionnaire to discriminate workers at high-risk of work-related musculoskeletal disorders using ROC analysis. METHODS: The diagnostic results determined by rehabilitation medicine specialists in 370 persons(89 shipyard CAD workers, 113 telephone directory assistant operators, 79 women with occupation, and 89 housewives) were compared with participant's own replies to 'the questionnair on the worker's subjective physical symptoms'(Kwon, 1996). The AUC's from four models with different methods in item selection and weighting were compared with each other. These 4 models were applied to 225 persons, working in an assembly line of motor vehicle, for the purpose of AUC reliability test. RESULTS: In a weighted model with 11 items, the AUC was 0.8155 in the primary study population, and 0.8026 in the secondary study population(p=0.3780). It was superior in the aspects of discriminability, reliability and convenience. A new questionnaire of musculoskeletal disorder could be constructed by this model. CONCLUSION: A more valid questionnaire with a small number of items and the quantitative weight scores useful for the relative comparisons are the main results of this study. While the absolute reference value applicable to the wide range of populations was not estimated, the basic intent of this study, developing a surveillance tool through quantitative validation of the measures, would serve for the systematic disease prevention activities.
Key words: Receiver operating characteristic; Questionnaire; Surveillance; Musculoskeletal disorder
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