Table 2
Characteristics of the smokers in the study cohort (n = 140)
Characteristic
Value
Age of smoking initiation (years), mean (SD)
17.5 (3.9)
Number of pack years, mean (SD) {range}
20.0 (22.4) {<1.0–144}
Duration of smoking cessation for former smokers (n = 89) (years), mean (SD)
14.2 (10.0)