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Interexaminer reliability of supine leg checks for discriminating leg-length inequality.
MedLine Citation:
PMID:  21621725     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
OBJECTIVE: The purpose of this study was to quantify interexaminer reliability of a standardized supine leg check procedure used to screen for leg-length inequality.
METHODS: Two doctors of chiropractic used a standardized supine leg check procedure to examine 50 volunteers for leg-length inequality. The order of examination was randomized. The side and magnitude of leg-length inequality were determined to the nearest 1/8 in. Subjects and examiners were blinded. Interexaminer reliability was assessed with a Bland-Altman plot, tolerance table of absolute differences, a quadratic weighted κ statistic for quantitative scores, and a Gwet's first-order agreement coefficient for dichotomous ratings.
RESULTS: The quadratic weighted κ statistic to quantify the reliability of the rating scale was 0.44 (95% confidence interval, 0.21-0.67), indicating moderate reliability. The 2 examiners agreed exactly 32% of the time, within 1/8 in 58% of the time, within 3/16 in 72% of the time, and within 3/8 in 92% of the time. The Bland-Altman plot revealed possible heterogeneity in reliability that requires additional study. The examiners agreed on the presence of a leg-length inequality of at least 1/8 in in 40 (80%) of 50 subjects (first-order agreement coefficient, 0.76), suggesting good agreement for this diagnostic category.
CONCLUSION: The examiners showed moderate reliability in assessing leg-length inequality at 1/8-in increments and good reliability in determining the presence of a leg-length inequality.
Authors:
H Charles Woodfield; B Burt Gerstman; Renate Henry Olaisen; Dale F Johnson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of manipulative and physiological therapeutics     Volume:  34     ISSN:  1532-6586     ISO Abbreviation:  J Manipulative Physiol Ther     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-05-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7807107     Medline TA:  J Manipulative Physiol Ther     Country:  United States    
Other Details:
Languages:  eng     Pagination:  239-46     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 National University of Health Sciences. Published by Mosby, Inc. All rights reserved.
Affiliation:
Researcher, Upper Cervical Research Foundation, Raleigh, NC; Life Chiropractic College West, Hayward, CA.
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