The St. George’s Respiratory Questionnaire Definition of Chronic Bronchitis May Be a Better Predictor of COPD Exacerbations Compared With the Classic Definition

The State of US Health, 1990-2016

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Public Health, Health Sciences, Epidemiologic Methods +16

Epidemiology Standardization Project (American Thoracic Society).

Ferris Bg · PubMed · 1978 · 1.4K citations

Medicine, Health Sciences, Internal Medicine +5

Genetic Epidemiology of COPD (COPDGene) Study Design

Elizabeth A. Regan, John E. Hokanson, James R. Murphy et al. · COPD Journal of Chronic Obstructive Pulmonary Disease · 2010 · 1.3K citations · Full text

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Association of Chronic Mucus Hypersecretion With FEV1 Decline and Chronic Obstructive Pulmonary Disease Morbidity. Copenhagen City Heart Study Group

Jørgen Vestbo, Eva Prescott, Peter Lange · American Journal of Respiratory and Critical Care Medicine · 1996 · 754 citations

Medicine, Clinical Sciences, Internal Medicine +13

Cough and Sputum Production Are Associated With Frequent Exacerbations and Hospitalizations in COPD Subjects

Pierre‐Régis Burgel, Pascale Nesme‐Meyer, Pascal Chanez et al. · CHEST Journal · 2008 · 345 citations

Medicine, Clinical Sciences, Internal Medicine +16