Validation of the Airways Questionnaire 20 - AQ20 in patients with chronic obstructive pulmonary disease (COPD) in Brazil
AUTOR(ES)
Camelier, Aquiles, Rosa, Fernanda, Jones, Paul, Jardim, José Roberto
FONTE
Jornal de Pneumologia
DATA DE PUBLICAÇÃO
2003
RESUMO
INTRODUCTION: A great emphasis has been placed on health-related quality of life of COPD patients and specific questionnaires have been developed in order to measure it. OBJECTIVE: This study describes the language and cultural adaptation of a new (and short) disease-specific health status questionnaire developed for chronic obstructive pulmonary diseases: the Airways Questionnaire 20 (AQ20). METHODS: In order to validate this questionnaire in Brazil, it was initially translated into Portuguese. The cultural adaptation was taken into consideration and then a back translation to English was undertaken, in order to obtain a final Portuguese version. Correlations were made with FEV1, SpO2, BMI and another disease-specific health status questionnaire, the Saint George Respiratory Questionnaire (SGRQ), previously validated in Brazil. The interclass correlation ratio was done to test the reproducibility of AQ20. RESULTS: The interclass correlation ratio for the total score was alpha = 0.90 (intra-observer variability) and alpha = 0.93 (inter-observer variability) (p < 0.05 for both). The correlation with total SGRQ score was 0.76, with p < 0.001. The average time to answer the AQ20 was 4 min and 6 s. CONCLUSION: The Brazilian Portuguese version of AQ20 is reproducible, of fast application and with good a correlation with SGRQ total score, which makes it a valid questionnaire to measure health status in obstructive patients in Brazil.
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