Preoperative predictors of locomotor ability two months after total knee arthroplasty for severe osteoarthritis
Version of Record online: 7 FEB 2003
Copyright © 2003 by the American College of Rheumatology
Arthritis Care & Research
Volume 49, Issue 1, pages 36–50, 15 February 2003
How to Cite
Parent, É. and Moffet, H. (2003), Preoperative predictors of locomotor ability two months after total knee arthroplasty for severe osteoarthritis. Arthritis & Rheumatism, 49: 36–50. doi: 10.1002/art.10906
- Issue online: 7 FEB 2003
- Version of Record online: 7 FEB 2003
- Manuscript Accepted: 25 APR 2002
- Manuscript Received: 19 SEP 2000
- Medical Research Council of Canada
- Réseau Provincial de Recherche en Adaptation-Réadaptation
- Fonds de la Recherche en Santé du Québec (FRSQ)
- Ordre Professionnel des Physiothérapeutes du Québec
- Quebec Rehabilitation Institute
- Total knee arthroplasty;
- Gait, functional capacity;
- 6-minute gait test;
To identify preoperative predictors of locomotor ability 2 months after total knee arthroplasty (TKA).
Sixty-five participants scheduled for a first TKA were recruited. The dependent variable was the distance covered during the 6-minute gait test 2 months after TKA. The independent variables, measured before surgery, were grouped into 3 categories: 1) personal; 2) organic system, and 3) capability variables. Multiple regression analyses were conducted to determine the best predictors of the dependent variable. Modified cross-validation of the model combining predictors from the three categories was obtained with 10 random samples derived from the original cohort by resampling with replacement.
Predictors were identified in the 3 categories: 1) gender, number of comorbidities, body mass index, 2) knee pain, flexion and strength, lower limb mechanical power, and 3) preoperative 6-minute gait distance. When these variables were modeled together only the preoperative 6-minute gait distance and knee pain and flexion remained significant (adjusted R2 = 0.66).
Using variables easily measured before surgery, it is possible to predict with good accuracy locomotor ability 2 months after TKA.