Abstract
Purpose: The Knee injury and Osteoarthritis Outcome Score (KOOS) questionnaire is a widely used patient-reported outcome tool, developed to evaluate short- and long-term knee symptoms and function. Previous studies evaluating knee complaints in the general population have shown that individuals in the general population do not report the best possible score on knee-specific questionnaires, stressing the need for benchmarks for adequate interpretation of these patient-reported scores. Therefore, we aimed to improve the interpretation of the KOOS by developing reference curves in a large population-based cohort.
Highlights
In prior mixed methods research, we elucidated knee osteoarthritis (OA) patients and arthroplasty surgeons’ opinions about patient appropriateness for total knee arthroplasty (TKA)
A standardized physical examination of the knee was performed, allowing the classification of participants with clinical knee osteoarthritis according to the ACR criteria, which were fulfilled in 15% of participants
Knee injury and Osteoarthritis Outcome Score (KOOS) scores of participants classified with knee osteoarthritis were compared to the reference curves
Summary
In prior mixed methods research, we elucidated knee osteoarthritis (OA) patients and arthroplasty surgeons’ opinions about patient appropriateness for total knee arthroplasty (TKA). Results: Selection appeared logistically feasible and baseline characteristics were statistically significant different between included and excluded participants: age 66.5 (SD 7.1) vs 68.1 (7.7) years, minimum joint space width (minJSW) 2.5 (1.3) vs 2.1 (1.0) mm, and adapted KOOS pain 31.3 (19.7) vs 17.7 (14.6), except for age, all: p
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