Validity and reliability of the Turkish version of the clinical COPD questionnaire

This study was conducted to determine the validity and reliability of the Turkish version of the Clinical COPD Questionnaire developed to evaluate respiratory symptoms, restrictions in physical activity, and emotional problems experienced by the patients with chronic obstructive pulmonary disease (COPD) within the past one week. The study was conducted on 100 patients with COPD who were admitted to the pulmonary diseases outpatient clinic at a training and research hospital in Ankara between January 2 and February 10, 2017. In studies in methodological kind, patient information form and the Clinical COPD Questionnaire it was used. In this study, the Cronbach's alpha coefficient of total scores of the questionnaire was 0.903 and Intraclass Correlation Coefficient (ICC) was found to be 0.80. The Cronbach's alpha values and ICCs of the subscale of the questionnaire were 0.878 and 0.734 for the functional state, 0.867 and 0.846 for mental state, and 0.827 and 0.828 for the symptoms. The questionnaire was re-administered one week after. The study concludes that the Turkish version of Clinical COPD Questionnaire is a valid and reliable tool to be used in the Turkish population.