Table 1.

Demographics of study sample at baseline (2002)

	Cigarettes only (%) (95% CI)	Smokeless only (%) (95% CI)	Cigarettes and smokeless (%) (95% CI)	Neither cigarettes nor smokeless (%) (95% CI)
	(n = 2565)	(n = 258)	(n = 53)	(n = 12 116)
Gender
Male	53.1 (51.0 to 55.2)	91.7 (85.5 to 95.4)	92.8 (80.0 to 97.6)	45.8 (45.2 to 46.4)
Female	46.9 (44.8 to 49.0)	8.3 (4.6 to 14.5)	7.2 (2.4 to 20.0)	54.2 (53.6 to 54.8)
Age (years)
18–24	12.0 (9.9 to 14.5)	8.3 (3.7 to 17.6)	10.1 (3.1 to 28.3)	11.6 (10.9 to 12.3)
25–44	46.1 (43.4 to 48.8)	55.1 (46.0 to 64.0)	62.5 (45.3 to 77.0)	39.9 (39.1 to 40.6)
45–64	34.3 (32.0 to 36.7)	23.4 (17.2 to 31.1)	22.4 (12.4 to 37.0)	31.3 (30.6 to 31.9)
65+	7.6 (6.5 to 9.0)	13.1 (9.1 to 18.6)	5.0 (0.7 to 28.2)	17.3 (16.9 to 17.8)
Ethnicity
White	78.5 (76.3 to 80.5)	86.5 (77.8 to 92.2)	85.8 (71.3 to 93.6)	70.7 (70.0 to 71.5)
Hispanic	7.6 (6.0 to 9.6)	3.6 (1.2 to 10.5)	3.2 (0.7 to 12.9)	12.5 (12.0 to 13.2)
Black	11.2 (9.7 to 12.9)	8.2 (4.4 to 14.7)	5.7 (1.2 to 23.5)	11.5 (11.0 to 12.0)
Asian	1.8 (1.1 to 2.8)	0	0	4.7 (4.2 to 5.1)
American Indian	1.0 (0.6 to 1.7)	1.7 (0.6 to 5.1)	5.3 (1.3 to 19.3)	0.6 (0.4 to 0.8)
Education (years)
≤12	57.5 (54.7 to 60.3)	60.1 (51.4 to 68.3)	63.4 (44.9 to 78.6)	43.6 (42.2 to 44.0)
>12	42.5 (39.7 to 45.3)	39.9 (31.7 to 48.7)	36.7 (21.4 to 55.1)	56.4 (55.1 to 57.8)

All percentages weighted by population parameters.