The OARSI core set of performance-based measures for knee osteoarthritis is reliable but not valid and responsive

2019

Tolk, J.J.

PURPOSE: The Osteoarthritis Research Society International has identified a core set of performance-based tests of physical function for use in people with knee osteoarthritis (OA). The core set consists of the 30-second chair stand test (30-s CST), 4 × 10 m fast-paced walk test (40 m FPWT) and a stair climb test. The aim of this study was to evaluate the reliability, validity and responsiveness of these performance-based measures to assess the ability to measure physical function in knee OA patients.METHODS: A prospective cohort study of 85 knee OA patients indicated for total knee arthroplasty (TKA) was performed. Construct validity and responsiveness were assessed by testing of predefined hypotheses. A subgroup (n = 30) underwent test-retest measurements for reliability analysis. The Oxford Knee Score, Knee injury and Osteoarthritis Outcome Score-Physical Function Short Form, pain during activity score and knee extensor strength were used as comparator instruments. Measurements were obtained at baseline and 12 months after TKA.RESULTS: Appropriate test-retest reliability was found for all three tests. Intraclass correlation coefficient (ICC) for the 30-s CST was 0.90 (95% CI 0.68; 0.96), 40 m FPWT 0.93 (0.85; 0.96) and for the 10-step stair climb test (10-step SCT) 0.94 (0.89; 0.97). Adequate construct validity could not be confirmed for the three tests. For the 30-s CST, 42% of the predefined hypotheses were confirmed; for the 40 m FPWT, 27% and for the 10-step SCT 36% were confirmed. The 40 m FPWT was found to be responsive with 75% of predefined hypothesis confirmed, whereas the responsiveness for the other tests could not be confirmed. For the 30 s CST and 10-step SCT, only 50% of hypotheses were confirmed.CONCLUSIONS: The three performance-based tests had good reliability, but poor construct validity and responsiveness in the assessment of function for the domains sit-to-stand movement, walking short distances and stair negotiation. T

Functional outcome; Osteoarthritis; Performance-based measures; Total knee arthroplasty; Prospective Studies; Follow-Up Studies; Humans; Middle Aged; Osteoarthritis, Knee/diagnosis; Pain/surgery; Male; Exercise Test; Time Factors; Range of Motion, Articular; Female; Knee Joint/physiopathology; Surveys and Questionnaires; Arthroplasty, Replacement, Knee/standards; Severity of Illness Index; Reproducibility of Results; Walking; Aged; Pain Measurement; Walk Test; Preoperative Period; Tijdschriftartikel; Article

Open access content. Open access content
info:eu-repo/semantics/openAccess

DOI: 10.1007/s00167-017-4789-y
Knee Surgery, Sports Traumatology, Arthroscopy vol.27 (2019) nr.9 p.2898-2909 [ISSN 0942-2056]
English

NLTUR oai:pure.tue.nl:publications/cc61d952-c0d8-4746-8e5d-3b288f157966
https://research.tue.nl/en/publications/cc61d952-c0d8-4746-8e5d-3b288f157966
1260210402

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