Chronic obstructive pulmonary disease (COPD) is a chronic lung disease that makes breathing difficult and is the third leading cause of death in the United States. A recent study found 20% of COPD patients live with an active smoker and 27% were exposed to secondhand smoke during the previous week. For the COPD patient, secondhand smoke exposure is linked to a greater risk for severe exacerbations (51%), nocturnal symptoms (58%), wheezing (34%), and chronic cough (77%).
Thorax, March 2016