There is broad consensus that good outcome measures are needed to distinguish interventions that are effective from those that are not. This task requires standardized, patient-centered measures that can be administered at a low cost. We developed a questionnaire to assess short- and long-term patient-relevant outcomes following knee injury, based on the WOMAC Osteoarthritis Index, a literature review, an expert panel, and a pilot study. The Knee injury and Osteoarthritis Outcome Score (KOOS) is self-administered and assesses five outcomes: pain, symptoms, activities of daily living, sport and recreation function, and knee-related quality of life. In this clinical study, the KOOS proved reliable, responsive to surgery and physical therapy, and valid for patients undergoing anterior cruciate ligament reconstruction. The KOOS meets basic criteria of outcome measures and can be used to evaluate the course of knee injury and treatment outcome.
Journal of Orthopaedic and Sports Physical Therapy, 1998, Vol 28, Issue 2, p. 88-96
Activities of Daily Living; Adult; Aged; Female; Humans; Knee Injuries; Life Style; Male; Middle Aged; Osteoarthritis; Pain Measurement; Patient Participation; Pilot Projects; Quality of Life; Questionnaires; Reproducibility of Results; Sensitivity and Specificity; Severity of Illness Index; Treatment Outcome