Asthma Diagnosis Poor Air Quality Exacerbations Complications Symptoms Medications Non-Cystic Fibrosis Bronchiectasis Drug Therapies Treatment Options Mortality Risk Causes Awareness Campaigns Risk Factors COPD Statistics Tobacco Use Bronchial Asthma
Findings from more than 9,000 smokers show a severity-related risk, with the COPD link persisting after competing-risk adjustment.