Postural stability in patients with knee osteoarthritis: Comparison with controls and evaluation of relationships between postural stability scores and international classification of functioning, disability and health components

Ru Lan Hsieh, Wen Chung Lee, Min Tzu Lo, Wei Cheng Liao

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22 Citations (Scopus)


Objectives: To assess the differences in postural stability between patients with knee osteoarthritis and controls without knee osteoarthritis, and to evaluate possible relations between postural stability scores and International Classification of Functioning, Disability and Health (ICF) components. Design: An age-matched, case-controlled trial with a cross-sectional design. Setting: A teaching hospital. Participants: Patients with knee osteoarthritis (n=73) and age-matched controls (n=60). Interventions: Data on patients' postural stability and additional health-related variables were collected using various instruments. These included the Hospital Anxiety and Depression Scale, the Multidimensional Fatigue Inventory, the World Health Organization Quality of Life Brief Version, the physical function test (chair-rising time), the Chinese version of the Western Ontario and McMaster Universities Osteoarthritis Index, the Chinese version of the Knee Injury and Osteoarthritis Outcome Score, and the Biodex Stability System. Main Outcome Measures: A comparison of postural stability in patients with knee osteoarthritis versus that of controls was performed. The relation between postural stability scores for patients with knee osteoarthritis and ICF components was evaluated. Pearson correlation tests were used to determine the variables that correlated with postural stability among these patients. Results: Patients with knee osteoarthritis displayed lower overall postural stability than controls (scores of 0.7 vs. 0.5, P=.006) and scored lower on the environmental domain of the World Health Organization Quality of Life Brief Version (62.2 vs 66.8, P=.014). For patients with knee osteoarthritis, postural stability was weakly associated with the ICF components of body functions and structures, including pain (r=.33-.34, P=.004), physical fatigue (r=.28, P=.016), and reduced motivation (r=.30, P=.011). Weak to moderate associations between postural stability and the ICF components of activities and participation were found; the relevant ICF variables included reduced activity (r=.38, P=.001), physical domain and function (r=.34-.48, P=.001 to P

Original languageEnglish
JournalArchives of Physical Medicine and Rehabilitation
Issue number2
Publication statusPublished - Feb 2013



  • Case-control studies
  • Knee osteoarthritis
  • Posture
  • Rehabilitation

ASJC Scopus subject areas

  • Rehabilitation
  • Physical Therapy, Sports Therapy and Rehabilitation

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