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
    Male53.1 (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)
    Female46.9 (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)
    18–2412.0 (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)
    25–4446.1 (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)
    45–6434.3 (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
    White78.5 (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)
    Hispanic7.6 (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)
    Black11.2 (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)
    Asian1.8 (1.1 to 2.8)004.7 (4.2 to 5.1)
    American Indian1.0 (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)
    ⩽1257.5 (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)
    >1242.5 (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.