Effect of Context Specificity on Response to the Shortened WOMAC Function Scale in Patients Undergoing Total Knee Arthroplasty.

Autor:	Pua YH; Department of Physiotherapy, Singapore General Hospital, Singapore; Medicine Academic Programme, Duke-NUS Graduate Medical School, Singapore. Electronic address: pua.yong.hao@sgh.com.sg., Koh SS; Department of Physiotherapy, Singapore General Hospital, Singapore., Terluin B; Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Department of General Practice, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, the Netherlands., Woon EL; Department of Physiotherapy, Singapore General Hospital, Singapore., Chew ES; Department of Physiotherapy, Singapore General Hospital, Singapore., Yeo SJ; Department of Orthopaedic Surgery, Singapore General Hospital, Singapore., Chen JY; Department of Orthopaedic Surgery, Singapore General Hospital, Singapore., Liow LMH; Department of Orthopaedic Surgery, Singapore General Hospital, Singapore., Clark R; Research Health Institute, University of the Sunshine Coast, Sunshine Coast, Australia., Thumboo J; Medicine Academic Programme, Duke-NUS Graduate Medical School, Singapore; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Health Services Research & Evaluation, SingHealth Office of Regional Health, Singapore.
Jazyk:	angličtina
Zdroj:	Archives of physical medicine and rehabilitation [Arch Phys Med Rehabil] 2024 Sep; Vol. 105 (9), pp. 1725-1732. Date of Electronic Publication: 2024 May 07.
DOI:	10.1016/j.apmr.2024.05.005
Abstrakt:	Objective: To determine, in patients undergoing total knee arthroplasty (TKA), whether increasing context specificity of selected items of the shortened version of the Western Ontario and McMaster Universities Osteoarthritis Index function (WOMAC-F) scale (ShortMAC-F) (1) enhanced the convergent validity of the ShortMAC-F with performance-based mobility measures (ii) affected mean scale score, structural validity, reliability, and interpretability. Design: Secondary analysis of randomized clinical trial data. Setting: A tertiary teaching hospital. Participants: Patients undergoing TKA (N=114). Interventions: Not applicable. Main Outcome Measures: The ShortMAC-F was modified by specifying the "ascending stairs" and "rising from sitting" items to enquire about difficulty in performing the tasks without reliance on compensatory strategies, whereas the modified "level walking" item enquired about difficulty in walking 400 m. Before and 12 weeks after TKA, patients completed the WOMAC-F questionnaire, modified ShortMAC-F questionnaire, knee pain scale questionnaire, sit-to-stand test, fast gait speed test, and stair climb test. Interpretability was evaluated by calculating anchor-based substantial clinical benefit estimates. Results: The modified ShortMAC-F correlated significantly more strongly than ShortMAC-F or WOMAC-F with pooled performance measures (differences in correlation values, 0.12-0.14). Increasing item context specificity of the ShortMAC-F did not influence its psychometric properties of unidimensionality (comparative fit and Tucker-Lewis indices, >0.95; root mean square error of approximation, 0.05-0.08), reliability (Cronbach's α, 0.75-0.83), correlation with pain intensity (correlation values, 0.48-0.52), and substantial clinical benefit estimates (16 percentage points); however, it resulted in lower mean score (4.5-4.8 points lower). Conclusions: The modified ShortMAC-F showed sufficient measurement properties for clinical application, and it seemed more adept than WOMAC-F at correlating with performance-based measures in TKA. (Copyright © 2024 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu