Table 1

 Individual level characteristics, neighbourhood SES, convenience store concentration, and number of cigarettes smoked per day, Stanford heart disease prevention programme (1979–1990) (n = 8121)

CharacteristicsDistribution (%)Number of cigarettes (mean)
FPL, federal poverty level. *Tertiles based on the distribution at each survey.
Sex
    Women54.64.4
    Men45.45.6
Age
    25–3430.84.3
    35–4423.45.8
    45–5416.96.2
    55–6416.84.9
    65–7412.13.2
Race/ethnicity
    White, non-Hispanic83.25.2
    Hispanic10.72.6
    Other, non-Hispanic6.14.6
Education
    <12 years16.05.9
    12 years27.06.3
    13–15 years27.15.0
    >15 years29.93.1
Poverty status
    0%–200% FPL22.15.4
    201%–400% FPL35.55.0
    401%–600% FPL23.34.7
    >600% FPL19.14.5
Neighbourhood SES*
    Low33.45.9
    Middle32.05.0
    High34.63.9
Convenience store density (stores/square mile)*
    High33.95.6
    Middle33.84.5
    Low32.34.6
Convenience store distance (miles)*
    Close33.35.5
    Middle33.35.0
    Far33.44.5
Convenience store count (number of stores within a one mile radius)*
    High31.65.2
    Middle36.05.4
    Low32.44.3