Table 1.
Infant characteristics.
| Gestational age | 22 weeks | 23 weeks | 24 weeks | |||
|---|---|---|---|---|---|---|
| Overall (N = 329) |
Survived (N = 58) |
Overall (N = 2690) |
Survived (N = 1116) |
Overall (N = 4559) |
Survived (N = 2914) |
|
| Birthweight (g), | 511 | 530 | 570 | 590 | 646 | 655 |
| median (IQR) | (465, 560) | (498, 579) | (516, 625) | (530, 640) | (577, 710) | (590, 720) |
| Male (%) Race (%) | 57 | 53 | 53 | 49 | 52 | 49 |
| White | 39 | 37 | 36 | 34 | 40 | 39 |
| Black | 36 | 37 | 38 | 38 | 35 | 36 |
| Hispanic | 19 | 17 | 21 | 23 | 19 | 19 |
| Other | 5 | 9 | 5 | 5 | 6 | 6 |
| Cesarean section (%) |
35 | 35 | 55 | 56 | 70 | 70 |
| SGA (%) | - | - | 16 | 11 | 17 | 12 |
| Received surfactant (%) |
86 | 90 | 91 | 92 | 89 | 90 |
| ANS (%) | 43 | 53 | 69 | 78 | 84 | 87 |
| APGAR (5 min), median (IQR) |
5 (3, 6) | 5 (4, 7) | 6 (3, 7) | 6 (4, 7) | 7 (5, 8) | 7 (5, 8) |
| Maternal age, median (IQR) |
27 (23, 31) | 27 (23, 30) | 28 (23, 32) | 28 (23, 32) | 28 (23, 33) | 28 (23, 33) |
| Prenatal care (%) | 93 | 88 | 93 | 93 | 94 | 94 |
| PROM (%) | 20 | 22 | 18 | 21 | 19 | 21 |
| LOS (in days), median (IQR) |
3 (2, 27) | 137 (116, 154) |
25 (3, 119) | 124 (110, 144) |
98 (17, 120) | 112 (98, 130) |
ANS antenatal steroids, APGAR Appearance, Pulse, Grimace, Activity, and Respiration, IQR interquartile range, LOS length of stay, PROM prolonged rupture of membranes, SGA small for gestational age.