Index to Chiropractic Literature
Index to Chiropractic Literature
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ID 21510
  Title Reliability of the passive knee flexion and extension tests in healthy subjects
URL http://www.ncbi.nlm.nih.gov/pubmed/21109056
Journal J Manipulative Physiol Ther. 2010 Nov-Dec;33(9):659-665
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Subject(s)
Peer Review Yes
Publication Type Article
Abstract/Notes Objective: Information on the reliability of the passive knee extension (PKE) and passive knee flexion (PKF) tests is still incomplete. Moreover, standardization of the 2 test procedures could be enhanced. The present study investigates interrater and test-retest reliability of the modified versions of the PKE and PKF tests to establish whether the level of reliability is sufficiently high to justify their use in scientific studies and clinical practice.

Methods: A total of 14 healthy subjects met the selection criteria. The 2 tests were carried out successively by each of the 3 clinicians/raters involved in the study, and each test was repeated 3 times. Two series of such measurements were performed. To evaluate interrater and test-retest reliability of the 2 tests, we calculated the intraclass correlation coefficients (ICCs), the standard errors of measurement, and the smallest detectable differences.

Results: The PKE and PKF tests showed excellent and good reliability, respectively. Mean ICCs for the PKE were greater than those for the PKF. Mean ICCs for the interrater reliability (0.88-0.93) were higher than those for test-retest reliability (0.84-0.93). No mean ICCs lower than 0.84 were found (test-retest for PKF). The lowest ICCs of 0.73 and 0.75 were registered for the test-retest reliability of PKF in the case of rater 1.

Conclusion: These results show excellent and good interrater and test-retest reliability of the PKE and PKF, respectively. The PKE test seems to be slightly more reliable. These findings may help clinicians when using these tests. For research purposes, investigators must critically evaluate whether the presented amount of error is acceptable for a specific setting.

This abstract is reproduced with the permission of the publisher; full text by subscription. Click on the above link and select a publisher from PubMed's LinkOut feature.
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