Individuals with knee osteoarthritis, regardless of the involvement of 1 or both knees, perform and perceive their functional ability similarly, say authors of an article published online in Arthritis Care & Research. This suggests that clinicians need to consider other factors, such as how long the disease has been progressing or how functional abilities have changed, when treating patients with knee osteoarthritis, the authors add.
The functional abilities of patients with symptomatic and radiographic diagnosed unilateral (N=84) or bilateral (N=68) knee osteoarthritis were evaluated with self-reports and performance-based tests. Self reports included the Knee Outcome Survey, Global Rating Scale, and Physical Component of Short Form-36; functional tests included Timed Up-and-Go, Stair Climbing Test, and 6-Minute Walk. Separate MANOVAs were performed separately for men and women to determine if perception (self-reports) and performance (functional tests) were dependent on the number of involved knees.
No significant main effects were observed in functional performance between groups for either sex. Similarly, the perception measures did not differ between groups. In general, individuals diagnosed with unilateral and bilateral knee osteoarthritis both performed functional tasks and perceived their functional ability similarly.
APTA members Joseph A. Zeni, PT, PhD, and Lynn Snyder- Mackler, PT, ScD, SCS, FAPTA, coauthored the article.