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Table 2 Age-adjusted inequality measures, per sex, smoking status and survey year

From: Evolution of socioeconomic inequalities in smoking: results from the Portuguese national health interview surveys

  1987 1995 1998/99 2005/06
Current smokers - men
 RII for education 0.84 [0.76;0.93] 0.95 [0.86;1.05] 0.96 [0.88;1.06] 1.49 [1.34;1.65]
 RII for income 0.97 [0.90;1.04] 0.87 [0.82;0.93] 0.97 [0.94;1.01] 1.15 [1.07;1.24]
 CI for income 0.10   0.09   0.07   −0.04  
Current smokers - women
 RII for education 0.01 [0.00;0.01] 0.02 [0.02;0.03] 0.07 [0.06;0.10] 0.21 [0.16;0.27]
 RII for income 0.11 [0.08;0.15] 0.24 [0.19;0.30] 0.36 [0.30;0.44] 0.51 [0.42;0.61]
 CI for income 0.54   0.38   0.32   0.19  
Former smokers - men
 RII for education 0.82 [0.75;0.90] 0.90 [0.84;0.96] 0.97 [0.91;1.03] 0.89 [0.84;0.95]
 RII for income 0.85 [0.78;0.93] 0.92 [0.87;0.98] 0.95 [0.93;0.98] 0.88 [0.83;0.92]
 CI for income −0.05   −0.03   −0.03   0.07  
Former smokers - women
 RII for education 1.17 [0.78;1.77] 0.78 [0.51;1.17] 0.60 [0.43;0.85] 0.41 [0.30;0.55]
 RII for income 0.89 [0.63;1.27] 0.71 [0.53;0.96] 0.62 [0.48;0.82] 0.60 [0.48;0.76]
 CI for income −0.01   0.08   0.11   0.18  
Ever smokers - men
 RII for education 0.72 [0.67;0.77] 0.73 [0.69;0.78] 0.77 [0.72;0.81] 1.04 [0.97;1.11]
 RII for income 0.92 [0.88;0.97] 0.83 [0.79;0.86] 0.93 [0.91;0.96] 0.93 [0.89;0.98]
 CI for income 0.11   0.11   0.08   0.02  
Ever smokers -women
 RII for education 0.01 [0.00;0.01] 0.02 [0.01;0.02] 0.05 [0.04;0.06] 0.11 [0.09;0.13]
 RII for income 0.10 [0.07;0.13] 0.20 [0.16;0.24] 0.28 [0.24;0.33] 0.36 [0.31;0.41]
 CI for income 0.56   0.42   0.36   0.27  
  1. Legend: 95% confidence intervals in parenthesis.