Characteristics of cohort infants at delivery
| Characteristics | Distribution |
| Gestational age (weeks) mean (SD) | 39.4 (1.9) |
| Gestational age (n, %) | |
| ⩾37 weeks | 1395 (94.6) |
| 33–36 weeks | 68 (4.6) |
| ⩽32 | 11 (0.8) |
| Birth weight (g) mean (SD) | 3365.6 (518.6) |
| Low birth weight (n, %) | |
| <1500 g | 9 (0.6) |
| 1500 g—2499 g | 52 (3.5) |
| ⩾2500 g | 1413 (95.9) |
| Gender (n, %) | |
| Male | 764 (51.8) |
| Female | 710 (48.2) |
| APGAR at 5 minutes (n, %) | |
| <7 | 15 (1.0) |
| ⩾7 | 1458 (99.0) |