Article

OBJECTIVE: To establish whether proprioception and varus-valgus laxity moderate
the association between muscle strength and activity limitations in patients with
early symptomatic knee osteoarthritis. SUBJECTS:
A sample of 151 participants with early symptomatic knee osteoarthritis from the
Cohort Hip and Cohort Knee study. METHODS: Regression analyses were performed to
establish the associations between muscle strength, proprioception (knee joint
motion detection threshold in the anterior--posterior direction), varus-valgus
laxity and activity limitations (self-reported and performance-based).
Interaction terms were used to establish whether proprioception and laxity
moderated the association between muscle strength and activity limitations.
RESULTS: Proprioception moderated the association between muscle strength and
activity limitations: the negative association between muscle strength and
activity limitations was stronger in participants with poor proprioception than
in participants with accurate proprioception (performance-based activity
limitations p = 0.02; self-reported activity limitations p = 0.08). The
interaction between muscle strength and varus-valgus laxity was not significantly
associated with activity limitations. CONCLUSION: The results of the present
study support the theory that in the absence of adequate proprioceptive input,
lower muscle strength affects a patient's level of activities to a greater degree
than in the presence of adequate proprioceptive input.

Langue : ANGLAIS