Responsiveness, reliability, and validity of Arabic version of Oxford Knee Score for total knee arthroplasty

Bin sheeha, B; Williams, AE; Johnson, DS; Granat, MH; Bin Nassar, A; Jones, R

Abstract

Background: The Oxford Knee Score (OKS) is a reliable, valid, and sensitive assessment tool for individuals undergoing a total knee arthroplasty (TKA). The published psychometric assessment of the Arabic version of the OKS (OKS-Ar) is limited to male patients and has not been assessed for responsiveness following TKA. The aim of this study was to assess the reliability, validity, and responsiveness of the OKS-Ar in an inclusive population of patients undergoing TKA.
Methods: One hundred Arabic-speaking patients awaiting TKA were assessed with the OKS-Ar, the Arabic version of the Knee injury and Osteoarthritis Outcome Score (KOOS-Ar), and a visual analogue scale for pain (VAS-P) in order to assess the correlation between the OKS-Ar and the KOOS-Ar and VAS-P and determine the construct validity. Repeat assessments were completed 7 to 10 days after the first assessment and 6 months after TKA.
Results: Questionnaires were completed by 80 female and 20 male participants with a mean age of 62 ± 8 years. The test and retest median scores showed no significant difference from one another, with a strong Spearman correlation between the 2 measurements (rs = 0.94). Bland-Altman limits of agreement showed no significant bias. The Cronbach alpha was 0.85 indicating high internal consistency. There was no floor or ceiling effect before TKA, and the post-TKA ceiling effect was only 2%. The OKS-Ar pain component correlated strongly with the KOOS-Ar pain subscale (rs = 0.73). The OKS-Ar effect size was 3.09, which was larger than that of all of the KOOS subscales at 6 months after TKA.
Conclusions: To our knowledge, this is the first study to assess reliability, validity, and responsiveness of the OKS-Ar after TKA. The validity and reliability results are similar to those found for both the original English-language OKS and the OKS translated into other languages. We believe that this is also the first study to assess OKS-Ar responsiveness after TKA and to show a large effect size. We found that the OKS-Ar is a feasible, valid, reliable, and sensitive measurement tool to assess pain and function in TKA-treated individuals whose main language is Arabic.

Citation

Bin sheeha, B., Williams, A., Johnson, D., Granat, M., Bin Nassar, A., & Jones, R. (2020). Responsiveness, reliability, and validity of Arabic version of Oxford Knee Score for total knee arthroplasty. Journal of Bone and Joint Surgery, American Volume, 102(15), e89. https://doi.org/10.2106/JBJS.19.00949

• Journal Article Type: Article
• Acceptance Date: Mar 3, 2020
• Online Publication Date: Jun 23, 2020
• Publication Date: Aug 5, 2020
• Deposit Date: Jun 25, 2020
• Publicly Available Date: Jun 23, 2021
• Journal: Journal of Bone and Joint Surgery
• Print ISSN: 0021-9355
• Electronic ISSN: 1535-1386
• Publisher: Lippincott, Williams & Wilkins
• Volume: 102
• Issue: 15
• Pages: e89
• DOI: https://doi.org/10.2106/JBJS.19.00949
• Publisher URL: https://doi.org/10.2106/JBJS.19.00949
• Related Public URLs: https://jbjs.org/