Table 4 Number of women (%) in each educational level stratum, adjusted odds ratios (aOR) and 95% confidence interval (CI) for smoking in those strata, and attributable fraction (AF), stratum-specific total attributable fraction (sTAF) and overall total attributable fraction (TAF) for each five-year period
No%aOR* (95% CI)AFsTAF
1982–6
High educational level12 50011.51.00 (Ref)
Middle educational level53 04148.72.5 (2.4 to 2.6)0.600.29
Low educational level43 30039.85.0 (4.9 to 5.2)0.800.32
All educational levels (n, %, TAF)108 841(29.7)0.61
1987–91
High educational level12 8669.91.00 (Ref)
Middle educational level71 85955.33.0 (3.0 to 3.1)0.670.37
Low educational level45 24234.87.1 (7.0 to 7.3)0.860.30
All educational levels (n, %, TAF)129 967(25.8)0.67
1992–6
High educational level94829.81.00 (Ref)
Middle educational level56 69058.73.5 (3.4 to 3.6)0.710.42
Low educational level30 44731.59.9 (9.1 to 9.6)0.890.28
All educational levels (n, %, TAF)96 619(19.3)0.70
1997–2001
High educational level43918.71.00 (Ref)
Middle educational level28 55156.84.6 (4.5 to 4.8)0.780.44
Low educational level17 35634.514.2 (13.7 to 14.8)0.930.32
All educational levels (n, %, TAF)50 298(12.7)0.76
  • *Adjusted for age, marital status and country of origin.