Fig. 4.

Smoking choice and topography measures (mean, SEM) for optional cigarettes smoked by men and women. Data collapsed on cigarette type as there were no significant differences between nicotinized and denicotinized cigarettes for choice or topography indices. Cigarettes chosen were averaged across nicotinized and denicotinized sessions. a *p < 0.05, women showed more cigarettes chosen than men; women showed more cigarettes chosen in the placebo condition than men. b **p ≤ 0.01, alcohol increased puff count in men; *p < 0.05, women showed higher puff count in the placebo condition than men. c *p < 0.05, alcohol increased puff volume in men. d *p < 0.05, alcohol increased puff duration in men