Table 1.
Basic subject characteristics
| Enrolled infants (n = 1768) | Infants with GA = 34 (n = 359) | Infants with GA = 35 (n = 571) | Infants with GA = 36 (n = 838) | |
|---|---|---|---|---|
| Birth weight (g) | 2404 ± 419 | 2126 ± 365* | 2320 ± 364** | 2581 ± 394 |
| Birth length (cm) | 46.1 ± 2.3 | 44.9 ± 2.6* | 45.8 ± 2.0** | 46.7 ± 2.18 |
| Birth head circumference (cm) | 32.7 ± 1.5 | 32.0 ± 1.8* | 32.5 ± 1.4** | 33.0 ± 1.4 |
| SGA n(%) | 451 (25.5) | 106 (29.5) | 149 (25.6) | 199 (23.7) |
| Males n (%) | 869 (49.2) | 179 (49.9) | 278 (48.7) | 412 (49.2) |
| Twins n (%) | 468 (26.5) | 128 (35.7)* | 163 (28.5) | 177 (21.1) |
*p < 0.0001 infants with GA = 34 weeks versus infants with 35 and 36 weeks
**p < 0.0001 infants with GA = 35 weeks versus infants with GA = 36 weeks