Table 1 Distribution of smoking before, during and after pregnancy among Canadian mothers (2005/06).
N* | % (95% CI)† | |
|---|---|---|
Smoking before pregnancy | 16,823 | 22.0 (21.1-23.0) |
Smoking after pregnancy | 12,634 | 16.5 (15.7-17.4) |
Smoking during pregnancy | 8,015 | 10.5 (9.8-11.2) |
Smoking during pregnancy frequency | ||
Daily | 5,253 | 6.9 (6.3-7.5) |
Occasionally | 2,762 | 3.6 (3.2-4.1) |
Never | 68,319 | 89.5 (88.8-90.2) |