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. 2016 Sep 13;11:2091–2097. doi: 10.2147/COPD.S106883

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© 2016 Deslee et al. This work is published and licensed by Dove Medical Press Limited

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CASA-Q scores for each domain and chronic bronchitis.

Notes: The CASA-Q assessed symptoms and impact in the previous 7 days. Chronic bronchitis was defined as daily cough and sputum production for at least 3 months each year during the past 2 years. All four CASA-Q domains (cough symptoms, cough impact, sputum symptoms, and sputum impact) were lower when chronic bronchitis was present (*P<0.0001), indicating more cough and sputum symptoms or impact.

Abbreviation: CASA-Q, cough and sputum assessment questionnaire.