Table 2

Characteristics of International Tobacco Four Country Survey sample by country (n=4048)

CanadaUSAUKAustralia
Sex
 Female55.1%58.3%56.6%53.2%
 Male44.9%41.7%43.4%46.8%
Age, years
 18–2412.6%11.9%6.3%14.5%
 25–3931.8%38.8%29.6%35.7%
 40–5435.8%36.7%35.7%35.5%
 55+19.9%24.5%28.3%14.3%
Education
 High school diploma or lower45.0%41.2%64.5%66.6%
 Technical, trade school, community college or some university41.4%44.9%23.0%20.5%
 University degree or higher13.6%13.8%12.5%12.9%
Income
 Under $30 000/under £15 000 (UK)31.1%38.1%32.8%29.5%
 $30 000–$59 999/£15 001–£30 00038.1%37.8%36.8%35.7%
 $60 000 and over/£30 001 and over30.8%24.1%30.5%34.8%
Ethnicity
 White/English only88.7%79.4%95.1%87.2%
 Other/mixed11.3%20.6%4.9%12.8%
Mean cigarettes per day (SD)16.0 (9.65)17.7 (11.5)16.6 (9.7)18.0 (12.4)
Mean time to first cigarette (min) (SD)72.2 (140.8)71.9 (142.2)73.6 (141.8)83.7 (154.7)
  • Measures of quitting and definitions of quitting outcome.