smoking associated_with COPD
Evidence from:
primary |
all sources
Evidence (1 sources)
Time to First Morning Cigarette and Risk of Chronic Obstructive Pulmonary Disease: Smokers in the PLCO Cancer Screening Trial.
(2015)
PMID:25985429
cited
The risk of COPD was higher among smokers with shorter TTFC.
confidence: 0.90