Smoking status of all women who completed screening questionnaire
| N=3265 | Per cent | 95% CI | |
|---|---|---|---|
| Never smoked | 1682 | 51.5 | 49.8 to 53.2 |
| Completely stopped smoking more than 3 months before pregnancy | 460 | 14.1 | 12.9 to 15.3 |
| Completely stopped smoking at some time in the 3 months prior to pregnancy | 86 | 2.6 | 2.1 to 3.2 |
| Completely stopped smoking after finding out pregnant | 390 | 11.9 | 10.9 to 13.1 |
| Smoke occasionally, not every day now pregnant | 153 | 4.7 | 4.0 to 5.4 |
| Smoke everyday, cut down during pregnancy | 387 | 11.9 | 10.8 to 13.0 |
| Smoke everyday, same as before pregnancy | 79 | 2.4 | 1.9 to 3.0 |
| Smoke everyday, more than before pregnancy | 6 | 0.2 | 0.08 to 0.4 |
| Missing | 22 | 0.7 |