Table 3 Maternal smoking prevalence among drop-outs
Intervention cohort | Control cohort | ||||||
|---|---|---|---|---|---|---|---|
n | % | 95% CI | n | % | 95% CI | p-value | |
Drop-outs* | 942 | 45.9 | 42.7–49.8 | 765 | 42.8 | 39.3–46.3 | 0.05 |
Maternal smoking prevalence at the beginning of pregnancy | 877 | 25.1 | 22.2–28.0 | 729 | 27.3 | 24.1–30.5 | 0.33 |
Maternal smoking prevalence during pregnancy | 877 | 9.1 | 7.2–11.0 | 723 | 12.4 | 10.0–14.8 | 0.03 |