Measurement properties of the OARSI core set of performance-based measures for hip osteoarthritis: a prospective cohort study on reliability, construct validity and responsiveness in 90 hip osteo-arthritis patients

Jaap J. Tolk (Corresponding author), Rob P.A. Janssen, C. (Sanna) A.C. Prinsen, M. (Marieke) C. van der Steen, Sita M.A. Bierma Zeinstra, Max Reijman

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)
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Abstract

Background and purpose - Improvement of physical function is one of the main treatment goals in severe hip osteoarthritis (OA) patients. The Osteoarthritis Research Society International (OARSI) has identified a core set of performance-based tests to assess the construct physical function: 30-s chair stand test (30-s CST), 4x10-meter fast-paced walk test (40 m FPWT), and a stair-climb test. Despite this recommendation, available evidence on the measurement properties is limited. We evaluated the reliability, validity, and responsiveness of these performance-based measures in patients with hip OA scheduled for total hip arthroplasty (THA). Patients and methods - Baseline and 12-month follow-up measurements were prospectively obtained in 90 end-stage hip OA patients who underwent THA. As there is no gold standard for comparison, the hypothesis testing method was used for construct validity and responsiveness analysis. A test can be assumed valid if ≥75% of predefined hypotheses are confirmed. A subgroup (n = 30) underwent test-retest measurements for reliability analysis. The Oxford Hip Score, Hip injury and Osteoarthritis Outcome Score-Physical Function Short Form, pain during activity score, and muscle strength were used as comparator instruments. Results - Test-retest reliability was appropriate; intraclass correlation coefficient values exceeded 0.70 for all 3 tests. None of the performance-based measures reached 75% hypothesis confirmation for the construct validity or responsiveness analysis. Interpretation - The performance-based tests have good reliability in the assessment of physical function. Construct validity and responsiveness, using patient-reported measures and muscle strength as comparator instruments, could not be confirmed. Therefore, our findings do not justify their use for clinical practice.

Original languageEnglish
Pages (from-to)15-20
Number of pages9
JournalActa Orthopaedica
Volume90
Issue number1
DOIs
Publication statusPublished - Feb 2019
Externally publishedYes

Keywords

  • Aged
  • Arthralgia/diagnosis
  • Arthroplasty, Replacement, Hip/adverse effects
  • Disability Evaluation
  • Female
  • Humans
  • Male
  • Middle Aged
  • Muscle Strength
  • Netherlands/epidemiology
  • Osteoarthritis, Hip/diagnosis
  • Outcome and Process Assessment, Health Care
  • Physical Functional Performance
  • Prognosis
  • Recovery of Function
  • Reproducibility of Results

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