Article

Agreement, Responsiveness, and Convergence
With Physical Performance for Knee Osteoarthritis Patients ; OBJECTIVE: To compare the Lower Limb Tasks Questionnaire (LLTQ) with the Western
Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in terms of
agreement, responsiveness, and convergence. DESIGN: Cross-sectional with an
exploratory repeated-measures subsample analysis.
SETTING: Community-based
seniors' centers and arthritis clinics. PARTICIPANTS: Individuals with
symptomatic knee osteoarthritis (N=76) participated, with a subsample of 18
participants contributing to the pre- and postarthroplasty subanalysis.
INTERVENTION: Not applicable. OUTCOME MEASURES : Bland and Altman plots of
agreement with 95% limits of agreement, statistical responsiveness, and
standardized response mean (SRM) were calculated for LLTQ and WOMAC subscales.
Both t tests and Wilcoxon rank-sum tests were used to examine changes in pre- and
postarthroplasty self-reported function, 50-ft walk speed, stair ascent/descent
speed, and isometric quadriceps strength. RESULTS: The agreement (bias) of the
LLTQ activities of daily living (ADL) subscale when compared with the WOMAC
physical function (PF) subscale was 1%+/-10% (mean +/- SD), and the 95% limits of
agreement were -19% to +22%. The statistical responsiveness of the WOMAC-PF and
LLTQ ADL was 1.17 and -.63, respectively. The SRMs for these scales were .90 and
-.61, respectively. The WOMAC-PF scores showed a notable improvement over the
first 6 weeks postarthroplasty, while LLTQ ADL scores were unchanged. The
objective measures of function were all significantly worse at 6 weeks.
CONCLUSIONS: The LLTQ demonstrated adequate agreement with the WOMAC and
acceptable responsiveness for use in place of the WOMAC in nonspecialized
clinics. The LLTQ may more accurately represent functional status after total
knee arthroplasty, but further study in larger samples is recommended.
CI - Copyright (c) 2013 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS