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Association of aspirin use with incidence of COPD exacerbations, based on presence of chronic bronchitis at baseline, COPD severity, presence of emphysema (≥ 5%), and presence of cardiometabolic phenotype at baseline. GOLD = Global Initiative for Chronic Obstructive Lung Disease; MDCT = multidetector row CT; P-int = P value for interaction with aspirin use.
