Socioeconomic differences in smoking trends among pregnant women at first antenatal visit in Sweden 1982-2001: Increasing importance of educational level for the total burden of smoking.
BACKGROUND: There was a decrease 1982-2001 in smoking during early pregnancy in Swedish women. We sought to determine whether there was a parallel decrease in socio-economic inequality in smoking. METHODS: Registry data indicating educational level and smoking status at first antenatal visit in all 2,022,469 pregnancies in Sweden 1982-2001 was analysed. Prevalence differences, odds ratios based on
