• Alvar Agustí, Alberto Fernández-Villar, Alberto Capelastegui, Manuel García-Losa, Beatriz Velasco, and Guadalupe Sánchez.
• Institut del Tòrax, Hospital Clínic, IDIBAPS, Universitat de Barcelona, Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Madrid, España. Electronic address: AAGUSTI@clinic.ub.es.
• Arch. Bronconeumol. 2017 Jun 1; 53 (6): 311-317.

ObjectivesTo assess the linguistic equivalence of the COPD Assessment Test versions in Catalan (CAT-C), Galician (CAT-G) and Basque (CAT-V) with the validated Spanish version (CAT) in COPD patients able to use both official languages.MethodsStudy performed in primary care centers in Catalonia, Galicia and the Basque Country. Half of the patients completed the questionnaire in their local language followed by the CAT in Spanish, while the other half did so in reverse order.Results151 COPD patients were included in the study, with a mean age of 69.0 (SD: 9.7) years. Most (79.5%) were men, 11.3% were educated up touniversity level, and 31.8% were current smokers. Mean FEV1 was 61.4% (SD: 16.8) predicted and 83.9% of patients were GOLD grade i or ii. Concordance between CAT-C, CAT-G and CAT-V and CAT was high, with differences between scores from 0.4 to-0.5. Reliability (Cronbach's alpha) ranged from0.72 to0.86. Convergent validity, when correlated with the Medical Research Council Dyspnea scale (P=.003) and Saint George's Respiratory Questionnaire (ICC, r=0.74) scores, was significant.ConclusionsCAT-C, CAT-G and CAT-V scores were similar to CAT scores, with high correlation and concordance. These results show the equivalence between the validated Spanish CAT and the versionin other languages, so CAT-C, CAT-G and CAT-V can be used in individuals whose main language is Catalan, Galician or Basque.Copyright © 2016 SEPAR. Publicado por Elsevier España, S.L.U. All rights reserved.

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