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J Rehabil Med. 2012 Oct;44(10):862-8. doi: 10.2340/16501977-1029.

Proprioception, laxity, muscle strength and activity limitations in early symptomatic knee osteoarthritis: results from the CHECK cohort.

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1
Amsterdam Rehabilitation Research Center Reade, Amsterdam, The Netherlands. j.holla@reade.nl

Abstract

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.

DESIGN:

A cross-sectional study.

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.

PMID:
22930102
DOI:
10.2340/16501977-1029
[Indexed for MEDLINE]
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