Table 1.

Subject Characteristics

	Age (years)	Years of smoking	Cigarettes smoked/day	BMI	Baseline CO levels	Baseline plasma nicotine levels
High-nicotine cigarette group (n = 10)	25.6 ± 1.1	6.7 ± 0.7	16.5 ± 1.0	24.1 ± 0.6	3.4 ± 0.8	1.61 ± 0.2
Low-nicotine cigarette group (n = 10)	25.2 ± 0.8	5.0 ± 0.3	15.0 ± 0.5	24.8 ± 0.4	3.7 ± 0.7	1.20 ± 0.2
High-IV-nicotine group (n = 9)	25.9 ± 0.8	9.5 ± 2.4	19.6 ± 2.2	25.8 ± 0.8	3.6 ± 1.1	1.33 ± 0.6
Low-IV-nicotine group (n = 6)	28.0 ± 3.1	10.6 ± 3.2	21.8 ± 4.5	24.9 ± 0.8	4.2 ± 0.8	0.65 ± 0.5
ANOVA results	p = .58 F(3, 34) = 0.662	p = .11 F(3, 34) = 2.165	p = .11 F(3, 34) = 2.157	p = .25 F(3, 34) = 1.429	p = .95 F(3, 34) = 0.123	p = .39 F(3, 34) = 1.038