Table 3

 Adjusted odds ratios (95% confidence intervals) from logistic regression of having knowledge that smoking causes selected diseases on sociodemographic covariates

Knowledge that tobacco causes:Nicotine cause of most cancers*
Heart diseaseStrokeImpotenceLung cancer
Source: International Tobacco Control Four Country Survey Wave 1, 2002
*Odds ratios pertain to the odds of stating that nicotine does not cause most of the cancer.
Sex
    Male1.001.001.001.00
    Female1.02 (0.89 to 1.17)1.20 (1.08 to 1.33)1.13 (0.94 to 1.36)0.82 (0.75 to 0.89)
Age
    18–242.49 (1.97 to 3.15)1.32 (1.12 to 1.57)1.63 (1.31 to 2.04)8.75 (5.60 to 13.69)1.47 (1.26 to 1.71)
    25–392.28 (1.91 to 2.74)1.53 (1.33 to 1.76)1.39 (1.15 to 1.68)4.70 (3.62 to 6.09)1.34 (1.18 to 1.52)
    40–541.92 (1.61 to 2.28)1.54 (1.34 to 1.77)1.26 (1.05 to 1.52)2.26 (1.83 to 2.79)1.15 (1.02 to 1.30)
    55+1.001.001.001.001.00
Education
    Low1.001.001.001.001.00
    Medium1.13 (0.97 to 1.32)1.12 (1.00 to 1.26)1.11 (0.96 to 1.28)1.14 (0.92 to 1.42)1.61 (1.46 to 1.78)
    High1.14 (0.91 to 1.43)1.15 (0.97 to 1.35)1.51 (1.24 to 1.83)1.25 (0.91 to 1.73)2.36 (2.04 to 2.72)
Income
    Low1.001.001.001.001.00
    Medium1.21 (1.03 to 1.43)1.17 (1.03 to 1.32)1.10 (0.93 to 1.30)1.34 (1.07 to 1.68)1.24 (1.11 to 1.38)
    High1.71 (1.40 to 2.08)1.34 (1.17 to 1.54)1.14 (0.96 to 1.36)1.83 (1.39 to 2.41)1.53 (1.36 to 1.72)
    No info0.82 (0.65 to 1.04)0.91 (0.75 to 1.10)0.97 (0.73 to 1.29)0.64 (0.48 to 0.84)0.98 (0.83 to 1.16)
Country
    USA1.001.001.001.001.00
    Canada1.61(1.33 to 1.95)1.78 (1.54 to 2.07)2.45 (2.04 to 2.94)1.16 (0.89 to 1.52)1.13 (1.00 to 1.28)
    UK1.57 (1.30 to 1.90)0.90 (0.78 to 1.02)1.12 (0.93 to 1.35)1.12 (0.87 to 1.45)0.81 (0.71 to 0.91)
    Australia1.22 (1.01 to 1.47)1.50 (1.29 to 1.73)1.10 (0.91 to 1.32)0.92 (0.70 to 1.19)0.96 (0.85 to 1.09)