Table 1

Subject characteristics (healthy intermittent smokers).

Sex, male/female
12/4
Age, years
49 (39–71)
Smoked pack years
4 (0–40)
Smoked cigarettes per month
14 (1–60)
FEV1, % predicted
119 (68–144)
FEV1/ IVC, %
77.6 (68.1–87.0)

Values expressed as medians (ranges). FEV1: Forced Expiratory Volume in 1 second, IVC: Inspiratory Vital Capacity.

van der Vaart et al. Respiratory Research 2005 6:22   doi:10.1186/1465-9921-6-22