• R Soles Gonçalves, L M Cavalheiro, J Neves Gil, A Lima Rodrigues, A Pereira Coutinho, G Alves Henriques, and P Lopes Ferreira.
• Escola Superior de Tecnologia da Saúde de Coimbra, Instituto Politécnico de Coimbra, Coimbra, Portugal. ruigoncalves@estescoimbra.pt
• Rev Port Pneumol. 2013 Jul 1; 19 (4): 157-62.

ObjectiveTo translate and culturally adapt the Living with Asthma Questionnaire (LWAQ) to the Portuguese language and to test its reliability and validity.MethodsThe Portuguese version of this disease-specific health-related quality of life measure was obtained with forward/backward translations, consensus panels and a pre-test. The Portuguese LWAQ and Medical Outcomes Study - 36 item Short Form (SF-36) questionnaires, and a form for the characteristics of the patients were administered to 61 subjects with asthma.ResultsReliability of LWAQ scores was good with Cronbach's alpha coefficients ranging from 0.70 to 0.97 [with the exception of "preoccupation" (0.62) construct, and "sleep" (0.67) and "effects on others" (0.47) domains] and intraclass correlation coefficients between 0.86 and 0.99. Construct validity was supported by the confirmation of predefined hypotheses involving expected significant correlations between LWAQ total, constructs and domains, and SF-36 dimensions with similar content.ConclusionThe Portuguese LWAQ exhibited suitable psychometric properties, in terms of internal consistency, reproducibility and construct validity.Copyright © 2012 Sociedade Portuguesa de Pneumologia. Published by Elsevier España. All rights reserved.

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