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J Sport Rehabil. 2017 Jan;26(1):1-4. doi: 10.1123/jsr.2015-0178. Epub 2016 Nov 11.

The Reliability and Discriminative Ability of the Overhead Squat Test for Observational Screening of Medial Knee Displacement.

Author information

1
1 Dept of Kinesiology, University of Wisconsin - Madison, Madison, WI.
2
2 Dept of Biostatistics and Medical Informatics, University of Wisconsin - Madison, Madison, WI.

Abstract

CONTEXT:

The overhead squat test (OHS) is a functional screening exam that is used to identify high-risk movement profiles such as medial knee displacement (MKD). The reliability and discriminative ability of observational screening during the OHS to identify MKD have yet to be established.

OBJECTIVE:

To investigate the reliability and discriminative ability of observational screening for medial knee displacement MKD during the OHS.

STUDY DESIGN:

Clinical measurement, cross sectional.

PARTICIPANTS:

100 college students were video-recorded performing the OHS. Three certified athletic trainers classified the knee posture of each subject during the OHS on 2 different occasions using screening guidelines.

MAIN OUTCOME MEASURES:

Ratings were evaluated by calculating kappa coefficients for intra- and interrater levels of agreements. MKD was measured using motion analysis.

RESULTS:

Intrarater reliability ranged from .60-.76 with an average value of .70. Interrater reliability was substantial (kappa > .60) for both observation sessions (Fleiss kappa session 1 = .69, session 2 = .70). Sensitivity ranged was .58-.83, while specificity ranged was .70-.88. The MKD group displayed significantly more displacement than the no-MKD group (p < .001). There was a moderate positive correlation (r = .48, p < .001) between knee-posture group and MKD assessed using motion analysis.

CONCLUSION:

The OHS has substantial reliability and is able to assess the presence of MKD. The OHS should be used as part of a comprehensive examination that evaluates multiple movement patterns and risk levels.

KEYWORDS:

MKD; OHS; movement screening; preparticipation physical exam

PMID:
27834577
DOI:
10.1123/jsr.2015-0178
[Indexed for MEDLINE]

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