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Table 3 Prevalence (%) of smoking during pregnancy at first antenatal care visit and crude odds ratios (OR) with 95% confidence intervals (CIs) for each five-year period according to educational levels and country of origin from 1982-2001.

From: Are time-trends of smoking among pregnant immigrant women in Sweden determined by cultural or socioeconomic factors?

  Other Nordic Countries Other European Countries (Nordic countries excluded) Non-Europeans Countries
  % OR (95% CI) % OR (95% CI) % OR (95% CI)
1982-1986       
High level 16.9 1.0 16.6 1.0 12.6 1.0
Middle level 36.1 2.8 (2.5-3.1) 27.8 1.9 (1.6-2.3) 16.4 1.4 (1.1-1.8)
Low level 49.7 4.9 (4.4-5.4) 36.9 2.9 (2.4-3.6) 23.4 2.1 (1.6-2.8)
1987-1991       
High level 14.0 1.0 13.8 1.0 7.5 1.0
Middle level 33.9 3.2 (2.9-3.5) 25.1 2.1 (1.8-2.4) 13.4 1.9 (1.6-2.3)
Low level 51.4 6.5 (5.9-7.2) 33.4 3.1 (2.7-3.7) 13.2 2.0 (1.6-3.7)
1992-1996       
High level 10.5 1.0 10.5 1.0 4.8 1.0
Middle level 28.6 3.4 (3.0-3.8) 19.1 2.0 (1.8-2.3) 9.8 2.1 (1.8-2.5)
Low level 49.6 8.4 (7.4-9.4) 25.4 2.9 (2.5-3.3) 10.3 2.3 (1.9-2.7)
1997-2001       
High level 5.6 1.0 7.8 1.0 2.5 1.0
Middle level 20.6 4.4 (3.7-5.2) 17.6 2.5 (2.2-2.8) 5.9 2.5 (2.1-2.9)
Low level 44.4 13.4 (11.2-16.2) 25.2 4.0 (3.5-4.5) 8.1 3.4 (3.0-4.0)
  1. n = 234, 731