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A Rasch Analysis of the Korean Version of Oswestry Disability Questionnaire According to General Characteristics of Patients With Low Back Pain  

Kim, Gyoung-Mo (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University)
Park, So-Yeon (Dept. of Physical Therapy, College of Alternative Medicine, Jeonju University)
Yi, Chung-Hwi (Dept. of Physical Therapy, College of Health Science, Yonsei University, Dept. of Ergonomic Therapy, The Graduate School of Health and Environment, Yonsei University)
Publication Information
Physical Therapy Korea / v.18, no.2, 2011 , pp. 35-42 More about this Journal
Abstract
Three hundred and fourteen low back pain patients completed the Korean version of the Oswestry Disability Questionnaire (KODQ) and the Rasch analysis was then applied to identify the inappropriate items and to determine ODQ item difficulties according to a subject's characteristics. For women and youths, the 'sex life' item showed misfit statistics, whereas for older subjects it was the 'pain intensity' and 'standing' items. Also, in the acute low back group the 'pain intensity', 'standing' and 'sex life' items showed misfit statistics. For all subjects, the most difficult item was 'pain intensity', whereas the easiest item was 'walking'. But for the older and acute groups 'lifting' was the most difficult item and for those who have a visual analogue scale score of 3 or less 'sitting' was the most difficult item. These results show that differential item functioning is present in several items according to sex, age, acute and chronic pain, and VAS score. This study may be useful for adjusting the KODQ item difficulties for low back pain patients with different characteristics.
Keywords
Low back pain; Oswestry Disability Questionnaire; Rasch analysis;
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Times Cited By KSCI : 2  (Citation Analysis)
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