Article

OBJECTIVE: To determine the association of postural control with muscle strength,
proprioception, self-reported knee instability and activity limitations in
patients with knee osteoarthritis. METHODS: A total of 284 patients with knee
osteoarthritis from the Amsterdam Osteoarthritis cohort were included. Postural
control was assessed using the One-Leg Stand Test (OLST), in which the patients
were asked to stand on one leg for 30 s. Muscle strength (isokinetic
dynamometer), proprioception (joint motion detection threshold) and self-reported
knee instability (episodes of buckling, shifting or giving way) were also
assessed. Activity limitations were assessed using the Get Up and Go (GUG) test,
the walking up-down stairs test, and Western Ontario and McMaster University
Osteoarthritis Index - Physical Function subscale. Regression analyses were used
to assess the associations. RESULTS: Muscle weakness (p = 0.02) and
proprioceptive inaccuracy (p < 0.001) were associated with decreased postural
control. Decreased postural control was associated with less time performing the
GUG test (p < 0.001) and the walking up-down stairs test (p < 0.001). These
associations were found after adjustment for relevant confounders. CONCLUSION: In
patients with knee osteoarthritis, decreased postural control is associated with
muscle weakness, proprioceptive inaccuracy and performance-based activity
limitations. These results highlight the importance of including assessment and
training of postural control in this group of patients.

Langue : ANGLAIS