Functional Patient-Reported Outcome Measures After Hip or Knee Arthroplasty: A Systematic Review and Content Analysis Using the International Classification of Functioning, Disability, and Health.

Objective: This systematic review aimed to identify the existing patient-reported outcome measures (PROMs) used in hip or knee arthroplasty for adults with osteoarthritis and assess their content validity using the modified International Classification of Functioning, Disability, and Health (ICF) core set for osteoarthritis (OA).

Methods: Four databases were systematically searched to identify disease or joint-specific PROMs evaluating function after hip or knee arthroplasty. Two reviewers independently evaluated the content of PROMs based on established ICF linking rules.

Results: From 449 studies included in this review, 50 PROMs were identified. The mobility chapter of activities and participation was the most common component, followed by the sensory function and pain chapter of body function and structure. The most frequent ICF activity and participation categories were d451 going up and down stairs, d4701 using private motorized transportation, d4104 standing, and d4154 maintaining a standing position. However, 11 ICF categories of the modified OA core set were not captured in any PROMs. This ICF-based content analysis of PROMs revealed that included activity and participation categories vary widely, with little overlap among PROMs. The Knee Injury and Osteoarthritis Outcome Score and the Hip Disability and Osteoarthritis Outcome Score had the most coverage for activity and participation (36.7%).

Conclusion: Even though our search identified 50 specific PROMs, there remain gaps in content related to activity and participation coverage. By providing a content analysis of the PROMs used after hip or knee arthroplasty, this study may help clinicians select PROMs based on covered categories and relevant clinical objectives.