Document Detail

Brazilian version of airways questionnaire 20: a reproducibility study and correlations in patients with COPD.
MedLine Citation:
PMID:  15823458     Owner:  NLM     Status:  MEDLINE    
This study describes the correlations and reproducibility of AQ20, a simple health status questionnaire with 20 questions, which was designed to be useful especially in time sparing situations. A formal language validation process was done, in order to validate the AQ20 before studying its reproducibility. Thirty stable COPD patients answered the final version twice within 15 days. To test the reproducibility of AQ20, the interclass correlation coefficient and Bland-Altman display were used. Results were correlated with FEV1, SpO2, BMI, Mahler BDI, and the Saint George Respiratory Questionnaire (SGRQ). Twenty-five patients (83.3%) were male, with a mean age of 68.6 years. The mean predicted FEV1 (%) was 56.8%. The interclass correlation ratio for the total score was alpha=0.90 for the intraobserver variability and alpha=0.93 for the interobserver variability. The correlation with total SGRQ score was 0.76, with P<0.001. The mean application time for AQ20 was 4 min and 6 s, and the score calculation time, was 8 s. It can be concluded that AQ20 is reproducible, with an excellent correlation with SGRQ total score, and also having the advantage of taking just a few minutes to be applied and to have its score calculated.
Aquiles Camelier; Fernanda W Rosa; Paul W Jones; Jose R Jardim
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Publication Detail:
Type:  Evaluation Studies; Journal Article     Date:  2004-11-23
Journal Detail:
Title:  Respiratory medicine     Volume:  99     ISSN:  0954-6111     ISO Abbreviation:  Respir Med     Publication Date:  2005 May 
Date Detail:
Created Date:  2005-04-12     Completed Date:  2005-07-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8908438     Medline TA:  Respir Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  602-8     Citation Subset:  IM    
Pulmonary Division, Rehabilitation Center, Federal University of São Paulo, SP, Brazil.
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MeSH Terms
Analysis of Variance
Health Status*
Lung / physiopathology
Middle Aged
Observer Variation
Patient Compliance
Pulmonary Disease, Chronic Obstructive / physiopathology,  psychology*
Quality of Life*
Regression Analysis
Respiratory Function Tests
Sensitivity and Specificity

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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