| Baseline characteristics | Observation |
| Median of gestational age in weeks | 29.7 |
| Infant Gender; N (%) |
|
| Male | 241 (55.9) |
| Female | 190 (44.1) |
| Median of birth weight in grams | 1216.3 |
| Birth weight; N (%) |
|
| <750 | 42 (9.9) |
| 750 - 999 | 73 (17.2) |
| 1000 - 1249 | 110 (25.9) |
| 1250 - 1499 | 143 (33.6) |
| ≥1500 | 57 (13.4) |
| IUGR1; N (%) | 106 (24.6) |