Table 1.

Parameters of the subjects in the study groups

NonsmokersETS-exposed subjectsSmokers
No. subjects (n)292830
Average age (y)40.3 ± 2.137.5 ± 1.541 ± 2.2
Body mass index (kg/m2)24.8 ± 0.724.7 ± 0.525.2 ± 0.7
Smoked cigarettes/d13.5 ± 1.8
Self-reported exposure to ETS (h/d)05.8 ± 0.45
Self-reported exposure to ETS (cigarettes/d)*044.3 ± 14.2
Plasma cotinine levels (ng/mL)2.4 ± 0.73.3 ± 0.7779 ± 15.8
  • NOTE: Data are means ± SE.

  • * Estimated number of cigarettes smoked around ETS-exposed subjects each day.