Dr. Bennell has received consultant fees, speaking fees, and/or honoraria (less than $10,000) from the Australian Physiotherapy Association.
Predictors of single-leg standing balance in individuals with medial knee osteoarthritis
Article first published online: 30 MAR 2010
Copyright © 2010 by the American College of Rheumatology
Arthritis Care & Research
Volume 62, Issue 4, pages 496–500, April 2010
How to Cite
Hunt, M. A., McManus, F. J., Hinman, R. S. and Bennell, K. L. (2010), Predictors of single-leg standing balance in individuals with medial knee osteoarthritis. Arthritis Care Res, 62: 496–500. doi: 10.1002/acr.20046
- Issue published online: 30 MAR 2010
- Article first published online: 30 MAR 2010
- Manuscript Accepted: 4 DEC 2009
- Manuscript Received: 8 OCT 2009
- National Health and Medical Research Council. Grant Number: 454686
- University of Melbourne Early Career Researcher grant
- Sir Randal Heymanson Fellowship from the Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne
To identify factors related to single-leg standing balance in individuals with medial compartment knee osteoarthritis (OA).
This cross-sectional study assessed clinical, demographic, and biomechanical measures in 57 individuals and their relationships with single-leg standing balance. Differences in age, mass, symptoms, knee pain, radiographic severity, lower extremity alignment, and hip and knee extension as well as hip abduction torques were compared between those who could and could not perform 3 trials of single-leg standing balance. Multiple regression was used to identify predictors of center of pressure (COP) path length in those who could complete the task.
Thirty-four individuals (60%) successfully completed all 3 single-leg standing balance trials and were significantly younger (P = 0.003) than those who could not. No other variable was significantly different between the groups. Disease severity, number of painful knees, lower extremity alignment, pain intensity, and quadriceps torque were all significant predictors of COP path length. Specifically, better single-leg standing balance (smaller COP path length) was related to more severe radiographic changes and stronger quadriceps, those with bilateral symptoms, and to less varus malalignment and knee pain.
Single-leg standing balance in those with medial knee OA is related to the modifiable factors lower extremity alignment, knee pain, and quadriceps strength. Given the reduced balancing ability in this patient population, interventions targeting these factors are necessary.