From: Which women stop smoking during pregnancy and the effect on breastfeeding duration
 | OR of stopping smoking during pregnancy (CI 95%) | p |
---|---|---|
Before pregnancy >10 cigarettes/day | 0.4 (0.2–0.7) | 0.002 |
Primiparous | 2.1 (1.0–4.0) | 0.036 |
Drank alcohol before pregnancy | 2.6 (1.0–6.7) | 0.049 |