The use and reporting of WOMAC in the assessment of the benefit of physical therapies for the pain of osteoarthritis of the knee: findings from a systematic review of clinical trials

Poor reporting of both the WOMAC pain subscale and the WOMAC index resulted in significant uncertainty in the interpretation of the results of individual trials and limited their contribution to evidence synthesis. Improved adherence with the standard use of the WOMAC scoring system, with clear reporting of it in trials of OA of the knee should be encouraged.