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Meta-analysis identifies Back Pain Questionnaire reliability influenced more by instrument than study design or population.
MedLine Citation:
PMID:  23347850     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
OBJECTIVE: To assess if predefined variables in study design, instrument type, and patient characteristics account for variance in reported retest reliability for the Oswestry Disability Index (ODI) and Roland-Morris Questionnaire (RMQ). A second aim was a more precise estimate of instrument reliability.
STUDY DESIGN AND SETTING: A systematic literature search of MEDLINE, EMBASE, AMED, PsycINFO, and CINAHL was performed from inception to January 2011. Hand search, gray literature, and reference retrieval completed the search. Two blinded reviewers extracted the data. Original authors were contacted for the missing data. A meta-analysis was performed with the intraclass correlation coefficient as the outcome measure.
RESULTS: Fifty studies on 31 ODI and 28 RMQ cohorts were retrieved that met the inclusion criteria. Meta-analysis found the ODI more reliable than the RMQ (coefficient, -0.2840; P = 0.009) and lower reliability on increased days to retest (coefficient, -0.0089; P = 0.005) and in low back pain (LBP) with leg pain than LBP only cohorts (coefficient, -0.2194; P = 0.046). The use of a transition item to identify stable patients and percentage of cohort not included at retest were significant only on single variable analysis.
CONCLUSION: Study design and population influence the reliability of a given instrument, however, a greater difference in reliability exists between instruments.
Authors:
Jonathan H Geere; Jo-Anne L Geere; Paul R Hunter
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of clinical epidemiology     Volume:  66     ISSN:  1878-5921     ISO Abbreviation:  J Clin Epidemiol     Publication Date:  2013 Mar 
Date Detail:
Created Date:  2013-01-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8801383     Medline TA:  J Clin Epidemiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  261-7     Citation Subset:  IM    
Copyright Information:
Copyright © 2013 Elsevier Inc. All rights reserved.
Affiliation:
Physiotherapy Department, Spire Norwich Hospital, Old Watton Road, Colney, Norwich, Norfolk NR4 7DT, UK. Electronic address: jongjom@hotmail.com.
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