WOMAC osteoarthritis index
Objective: To validate the WOMAC Osteoarthritis Index for use in Sweden. Methods: Test-retest reliability, internal consistency, validity, and responsiveness was determined in 52 patients (mean age 48 (20-69)) with arthroscopically assessed cartilage damage of the tibio-femoral knee joint. Results: All WOMAC scales were internally consistent with Cronbach's alpha coefficients of 0.83, 0.87, and 0.