Table 1

Smoking status of all women who completed screening questionnaire

N=3265Per cent95% CI
Never smoked168251.549.8 to 53.2
Completely stopped smoking more than 3 months before pregnancy46014.112.9 to 15.3
Completely stopped smoking at some time in the 3 months prior to pregnancy862.62.1 to 3.2
Completely stopped smoking after finding out pregnant39011.910.9 to 13.1
Smoke occasionally, not every day now pregnant1534.74.0 to 5.4
Smoke everyday, cut down during pregnancy38711.910.8 to 13.0
Smoke everyday, same as before pregnancy792.41.9 to 3.0
Smoke everyday, more than before pregnancy60.20.08 to 0.4