Article

OBJECTIVE: To determine the preoperative strength of the muscle group of the
lower extremity that is most important in predicting functional recovery after
primary unilateral total hip replacement (THR). DESIGN: Prospective observational
study with inception cohort. SETTINGS: Joint care program (hospital care/clinical
division of a nursing home/outpatient physical therapy).
PARTICIPANTS: Patients
(N=55) undergoing primary unilateral THR. INTERVENTIONS: Not applicable. MAIN
OUTCOME MEASURES: Baseline measures within 2 weeks preoperative and follow-up at
6 and 12 weeks postoperative included isometric strength measurement of the hip
(flexors, extensors, abductors, adductors) and knee (flexors, extensors)
musculature using a handheld dynamometer. Functional outcome was tested using
performance-based (Timed Up and Go Test, 6-Minute Walk Test) and self-report
measures (Western Ontario and McMaster Universities Osteoarthritis Index,
subscale Physical Function [WOMAC PF], 36-Item Short Form Health Survey subscale
Mental Health, visual analog scale for pain). RESULTS: Of the patients (N=55;
mean age, 72.7+/-6.8y; 41 women) included; 18 dropped out, leaving 37 patients
for analyses. After correction for WOMAC PF score at baseline, body mass index,
sex, and age, the preoperative knee extensors strength measure of the operated
site was the only muscle group showing a significant effect on functional outcome
measured by using the WOMAC PF at 12 weeks postoperatively (R(2)=.355;
beta=-.105; P for beta=.004). CONCLUSION: Preoperative greater knee extensor
strength of the operated site is associated with better physical function,
measured by using the WOMAC PF at 12 weeks postoperative.
CI - Copyright (c) 2011 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS