Abstract
BackgroundThe aim of this study was to investigate the content validity including item reduction, construct validity and internal consistency of the existing 16-item Knee Osteoarthritis Patient Education Questionnaire. Former research had indicated that a reduction of items was necessary. Participants were patients with severe knee osteoarthritis who, prior to undergoing a knee replacement operation, participated routinely in a preoperative educational intervention.MethodsA mixed method design was used. The first step was directed at the reduction in the number of items on the 16-item Knee Osteoarthritis Patient Education Questionnaire. Based on a priori hypotheses, this was followed by a cross-sectional validation study, performed to compare the resulting 7-item Knee Replacement Patient Education Questionnaire to a patient-testing Interview Protocol that was tailored to the same patient educational material. Additionally, the revised questionnaire was correlated with both the Short Test of Functional Health Literacy and the Mini-Mental State Examination score.ResultsA relatively high internal consistency was found for the 7-item Knee Replacement Patient Education Questionnaire, with a Cronbach’s alpha of 0.84 (SE: 0.036). Explanatory factor analysis showed no evidence against a one-factor model, with the first and second eigenvalues being 3.8 and 0.31, respectively. Bayesian Estimation of the correlation between the 7-item Knee Replacement Patient Education Questionnaire and the Interview Protocol was 0.78 (mode) (95% HPD 0.58–0.89).ConclusionsThe 7-item Knee Replacement Patient Education Questionnaire shows good psychometric properties and could provide valuable support to health professionals. It can provide valid feedback on how patients waiting for a knee replacement operation experience an applied patient education intervention. Further investigation is needed to assess the applicability of the 7-item Knee Replacement Patient Education Questionnaire to larger samples in different hospitals and countries.
Highlights
The aim of this study was to investigate the content validity including item reduction, construct validity and internal consistency of the existing 16-item Knee Osteoarthritis Patient Education Questionnaire
Various studies have synthesized the evidence on the measurement properties of Patient-reported outcome measures (PROMs), as well as Performancebased test (PBT), in a population with knee and lower limb problems [3,4,5,6,7]
The preoperative patient education was offered in only two sessions in this follow-up study, compared with three sessions in the initial Knee osteoarthritis patient education questionnaire (KOPEQ) study
Summary
The aim of this study was to investigate the content validity including item reduction, construct validity and internal consistency of the existing 16-item Knee Osteoarthritis Patient Education Questionnaire. Patient-reported outcome measures (PROMs) and performance-based tests (PBTs) have been extensively used in research and commonly used in clinical practice to assess treatment outcomes for a variety of musculoskeletal conditions. Various studies have synthesized the evidence on the measurement properties of PROM, as well as PBT, in a population with knee and lower limb problems [3,4,5,6,7]. Previous research has addressed the benefits of preoperative education on postoperative outcomes for patients with knee osteoarthritis (OA) on a waiting list for knee replacement (KR) [8]. The understandability of the content of the offered patient education and the incentives that stimulate patients to “take action” and manage their own health are largely unexplored fields
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