Table 1

 Descriptive statistics by neighbourhood socioeconomic environment

Neighbourhood socioeconomic environment (quartiles)*
1 (most advantaged)234 (most disadvantaged)
*Quartiles based on summed ranks of the percentage of participants (a) with primary education, (b) with the main breadwinner in the unskilled manual group, and (c) being unemployed per neighbourhood.
Number of neighbourhoods21222122
Number of residents (n)1395262123582688
% Women50.852.351.551.6
Mean age, years (SD)46.7 (14.4)48.2 (14.7)49.5 (15.3)48.9 (15.7)
% Primary education8.816.324.532.0
% Lower manual5.411.416.523.0
% Unemployed0.63.13.86.1
% Smokers31.636.638.941.3
Mean number of cigarettes smoked (SD)15.5 (9.3)16.5 (8.7)16.4 (8.9)16.3 (8.8)
Mean age smoking initiation (SD)18.2 (5.5)18.0 (5.4)17.8 (5.6)17.3 (5.2)