Table 2

 Distribution of knowledge of health effects of smoking and constituents of tobacco smoke by education and income*

Smoking causes:Nicotine causes most of cancerTobacco smoke contains:
Heart diseaseStrokeImpotenceLung cancerCyanideMercuryArsenicCarbon monoxide
Source: Weighted data from International Tobacco Control Four Country Survey Wave 1, 2002.
*All numbers are percentages.
USA
Education
    Low83.771.633.793.550.845.915.139.181.7
    Medium87.074.135.995.441.054.817.842.587.7
    High88.876.431.093.630.062.822.352.388.0
Income
    Low85.372.132.793.851.443.315.836.283.6
    Medium87.174.336.996.043.452.816.742.586.8
    High88.574.232.895.132.265.719.751.486.9
CANADA
Education
    Low89.981.055.293.549.168.825.452.289.6
    Medium91.584.562.495.933.575.326.662.492.2
    High92.683.667.296.732.073.326.263.290.4
Income
    Low87.279.254.993.245.767.825.749.691.9
    Medium90.582.459.494.842.371.426.560.289.6
    High95.287.665.397.431.677.727.165.091.4
UK
Education
    Low88.569.232.292.755.821.510.014.758.6
    Medium91.073.038.094.744.827.011.918.471.5
    High92.270.653.996.825.340.013.926.882.6
Income
    Low84.364.231.190.557.421.310.917.157.7
    Medium91.574.735.895.747.326.411.117.165.9
    High93.873.343.596.839.429.410.418.372.4
AUSTRALIA
Education
    Low88.080.334.493.650.642.616.039.380.3
    Medium90.480.834.895.534.243.917.444.785.9
    High89.183.043.395.830.354.819.844.090.1
Income
    Low85.978.435.691.651.941.419.337.980.6
    Medium89.281.134.594.443.045.218.143.083.6
    High91.183.637.396.540.148.013.243.584.0