Prevalence (% and 95% CI) of neonatal adverse outcomes according to maternal anaemia status
| Maternal anaemia | Preterm birth % (95% CI) | Low birth weight % (95% CI) | SGA % (95% CI) | Congenital malformation % (95% CI) |
| Normal (≥110 g/L) | 10.9 (10.5 to 11.2) | 7.6 (7.2 to 7.9) | 14.1 (13.7 to 14.5) | 4.4 (4.2 to 4.7) |
| Mild (100–109 g/L) | 15.7 (14.5 to 16.9) | 13.7 (12.6 to 14.8) | 20.2 (18.9 to 21.5) | 3.9 (3.3 to 4.6) |
| Moderate (70–99 g/L) | 18.1 (16.3 to 19.9) | 17.8 (16.0 to 19.6) | 22.8 (20.8 to 24.7) | 5.0 (4.0 to 6.0) |
| Severe (<70 g/L) | 40.0 (30.2 to 49.8) | 44.0 (34.1 to 53.9) | 35.0 (25.5 to 44.5) | 4.0 (0.1 to 7.9) |
| Ptrend | <0.001 | <0.001 | <0.001 | 0.899 |
SGA, small for gestational age.