Validity and responsiveness of the Knee Society Clinical Rating System in comparison with the SF-36 and WOMAC.

摘要: Background: The aim of this study was to validate the Knee Society Clinical Rating System (knee and function scores) compare its responsiveness with that Western Ontario McMaster University Osteoarthritis Index (WOMAC) Medical Outcomes Study Short Form-36 (SF-36). Methods: Patients were recruited as part a prospective observational outcomes primary total knee arthroplasty for treatment osteoarthritis in four centers United States, six Kingdom, two Australia. Independent research assistants at each site collected clinical data. WOMAC, SF-36, patient satisfaction, demographic data obtained self-administered questionnaires. Results: A 862 eligible patients recruited, complete preoperative twelve-month available 697 (80.9%) them. mean age seventy years (range, thirty-eight ninety years), majority (58.9%) women. Low correlations found among items both score assessment times. pain scores had moderate-to-strong corresponding domains WOMAC SF-36 (r = 0.31 0.72). Measurement standardized response showed be more responsive (standardized mean, 2.2) than means, 2.0 1.4 function) 1.0 bodily 1.1 physical functioning). least measure 0.8). Correlation changes twelve months reports satisfaction improvement health status scores. Conclusions: There is poor correlation System, but rating system has adequate convergent construct validity. are measures outcome arthroplasty. As they less labor-intensive researchers use these instruments removes observer bias from design, preferable studies.