Table 1

 Sample characteristics by country

VariablesUSA n = 2135Canada n = 2202UK n = 2376Australia n = 2296
Source: Weighted data from International Tobacco Control Four Country Survey Wave 1, 2002.
% female46.445.949.944.6
Age (years)
    18–2415.514.314.217.2
    25–3931.133.733.435.5
    40–5435.934.928.532.1
    55+17.617.123.915.1
Education
    Low45.247.663.467.8
    Medium43.539.524.720.1
    High11.312.911.912.1
Income
    Low36.027.528.125.6
    Medium34.936.533.734.8
    High21.727.428.533.6
    No information7.48.59.75.9
% saying smoking causes:
    Heart disease85.890.989.688.6
    Stroke73.282.770.380.7
    Impotence34.359.636.235.6
    Lung cancer94.494.893.794.3
% saying nicotine causes most of cancer44.240.749.444.8
% saying tobacco smoke contains:
    Cyanide51.771.925.144.3
    Mercury17.126.011.016.7
    Arsenic42.157.717.041.0
    Carbon monoxide85.090.864.682.6