Document Detail

Psychometric properties and cross-cultural adaptation of the Brazilian Quebec back pain disability scale questionnaire.
MedLine Citation:
PMID:  19478648     Owner:  NLM     Status:  MEDLINE    
STUDY DESIGN: Cross-cultural translation and psychometric testing. OBJECTIVE: To translate and cross-culturally adapt the Quebec Back Pain Disability Scale (QDS) to Brazilian Portuguese and to examine its validity and reliability. SUMMARY OF BACKGROUND DATA: Current literature shows the need to adopt reliable and internationally standardized methods for the analysis of low back pain. To our knowledge, this specific questionnaire has not been translated and validated for Portuguese-speaking patients. METHODS: The translation and cross-cultural adaptation of the QDS were developed in agreement with internationally recommended methodology, and the resulting product was evaluated in this study with 54 consecutive patients. Internal consistency was obtained through Cronbach's alpha; reliability was estimated through the intraclass correlation coefficient and the Bland and Altman agreement (d = mean difference). Validity was determined by correlating the scores of the Brazil-QDS with the Brazilian version of the Roland-Morris Questionnaire and Visual Analogue Pain Scale by means of the Spearman rank correlation coefficient. RESULTS: The internal consistency obtained was excellent (Cronbach's alpha = 0.97). Intraobserver and interobserver reliability were considered strong (ICC = 0.93-d = 0.68 and 0.96-d = 0.57, respectively). The correlation with Brazilian Roland-Morris Questionnaire and with the Visual Analogue Scale was high (r = 0.857; r = 0.758, respectively). CONCLUSION: The data showed that the process of translation and cross-cultural adaptation were successful and that the adapted instrument demonstrated excellent psychometric properties.
Marcelo F Rodrigues; Edgard Michel-Crosato; Jefferson R Cardoso; Jefferson Traebert
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Spine     Volume:  34     ISSN:  1528-1159     ISO Abbreviation:  Spine     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2009-05-29     Completed Date:  2009-09-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7610646     Medline TA:  Spine (Phila Pa 1976)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  E459-64     Citation Subset:  IM    
Department of Ortopedia, Unoesc, Santa Catarina, Brazil.
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MeSH Terms
Back Pain / diagnosis,  physiopathology*,  psychology
Brazil / ethnology
Cross-Cultural Comparison
Cultural Characteristics
Pain Measurement / methods
Questionnaires / standards*
Reproducibility of Results

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