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Published on: August 30, 2016
Development of supine and standing knee joint position sense tests
Andrew Strong1, Divya Srinivasan2, Charlotte K Häger1
1Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Sweden.
Objectives:
We aimed to assess the test-retest reliability of a supine and standing knee joint position sense (JPS) test, respectively, and whether they discriminate knees with anterior cruciate ligament (ACL) injury from asymptomatic knees.
Design:
Repeated measures and cross-sectional.
Setting:
Research laboratory.
Participants:
For test-retest reliability, 24 persons with asymptomatic knees. For discriminative analysis: 1) ACLR - 18 persons on average 23 months after unilateral ACL reconstruction, 2) CTRL - 23 less-active persons, and 3) ATHL - 21 activity level-matched athletes.
Main Outcome Measures:
Absolute error (AE) and variable error (VE).
Results:
Test-retest reliability was generally highest for AE of the standing test (ICC 0.64-0.91). Errors were less for the standing compared to the supine test across groups. CTRL had greater knee JPS AE (P = 0.005) and VE (P = 0.040) than ACLR. ACLR knees showed greater VE compared to the contralateral non-injured knees for both tests (P = 0.032), albeit with a small effect size (ηp2 = 0.244).
Conclusions:
Our standing test was more reliable and elicited lesser errors than our supine test. Less-active controls, rather than ACLR, produced significantly greater errors. Activity level may be a more predominant factor than ACLR for knee JPS ∼2 years post-reconstruction.
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