Table 3.
Association between maternal age and fetal/infant mortality
| Age |
Risk ratio (95% confidence interval)a |
|||
|---|---|---|---|---|
| Stillbirth |
Neonatal |
|||
| Early | Late | Post | ||
| Maternal age, years | ||||
| <20 | 1.18 (1.09–1.27) | 1.36 (1.22–1.52) | 1.70 (1.37–2.09) | 3.26 (2.89–3.66) |
| 20–24 | 1.05 (0.99–1.10) | 1.08 (1.00–1.17) | 1.23 (1.05–1.44) | 1.93 (1.75–2.12) |
| 25–29 | Referent | 0.98 (0.91–1.05) | 1.03 (0.90–1.19) | 1.14 (1.04–1.25) |
| 30–34 | 1.11 (1.06–1.17) | Referent | Referent | Referent |
| ≥35 | 1.48 (1.39–1.58) | 1.26 (1.14–1.38) | 1.36 (1.13–1.64) | 1.04 (0.91–1.19) |
aAssociation for data pooled across all gestational intervals, and adjusted for marital status, parity, region, and period. These results are not gestational age-specific and are not subject to stratification bias.