Maternal smoking during pregnancy* | None smoker | 75.7% |
1–9 cigarettes/day | 10.5% | |
≥10 cigarettes/day | 6.4% | |
Parity | 1st born | 47.7% |
2nd born | 34.6% | |
3rd born | 12.6% | |
4th or subsequent | 5.1% | |
Birth details | ||
Proportion of females | 48.8% | |
Median (IQR**) gestational age (in weeks) at delivery | 40 (39–41) | |
Median (IQR**) birth weight in kg | 3.5 (3.2-3.8) | |
Child outcomes | ||
Proportion of children ever hospitalised for asthma | 0.85% |