Validation of the short-form WOMAC function scale for the evaluation of osteoarthritis of the knee

K. G. Auw Yang, N. J. H. Raijmakers, A. J. Verbout, W. J. A. Dhert and D. B. F. Saris

This study validates the short-form WOMAC function scale for assessment of conservative treatment of osteoarthritis of the knee. Data were collected before treatment and six and nine months later, from 100 patients with osteoarthritis of the knee to determine the validity, internal consistency, test-retest reliability, floor and ceiling effects, and responsiveness of the short-form WOMAC function scale. The scale showed high correlation with the traditional WOMAC and other measures,  the internal consistency was good and an excellent test-retest reliability was found and the responsiveness was adequate and comparable to that of the traditional WOMAC.  The authors conclude that the short-form WOMAC function scale is a valid, reliable and responsive alternative to the traditional WOMAC in the evaluation of patients with osteoarthritis of the knee managed conservatively. It is simple to use in daily practice and is therefore less of a burden for patients in clinical trials.

Journal of Bone and Joint Surgery – British Volume, Vol 89-B, Issue 1, 50-56.

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