Table 1 Maternal and infant characteristics
Characteristics | No extensive resuscitation (n = 5038) | Extensive resuscitation (n = 260) | P value |
|---|---|---|---|
Gestational age (weeks) | 28.96 ± 2.97 | 26.53 ± 2.52 | <.001 |
Birth weight (g) | 1087 ± 281 | 865 ± 290 | <.001 |
Birth weight < 10th percentilea | 1097 (21.9) | 45 (17.6) | 0.111 |
Birth weight < 3rd percentilea | 529 (10.5) | 16 (6.3) | 0.029 |
Male | 2520 (50.0) | 150 (57.7) | 0.016 |
Maternal age | 32.78 ± 4.18 | 32.93 ± 4.20 | 0.572 |
In vitro fertilization | 1104 (21.9) | 46 (17.7) | 0.107 |
Multiple births | 1776 (35.3) | 80 (30.8) | 0.140 |
Maternal diabetes | 411 (8.2) | 17 (6.5) | 0.350 |
Maternal hypertension | 1076 (21.4) | 36 (13.8) | 0.004 |
Amniotic fluid | <.001 | ||
Normal | 4255 (84.5) | 189 (72.7) | |
Oligohydramnios | 702 (13.9) | 55 (21.2) | |
Polyhydramnios | 81 (1.6) | 16 (6.2) | |
Premature rupture of membrane | 1775 (35.2) | 100 (38.5) | 0.288 |
Antenatal steroid | <.001 | ||
None | 1105 (21.9) | 94 (36.2) | |
Incomplete | 1584 (31.4) | 70 (26.9) | |
Complete | 2349 (46.6) | 96 (36.9) | |
Cesarean section | 3880 (77.0) | 195 (75.0) | 0.452 |
Outborn | 88 (1.7) | 9 (3.5) | 0.044 |
Chorioamnionitisb | 1408 (33.0) | 100 (44.2) | <.001 |
Apgar score | |||
1-min | 4.75 ± 1.97 | 1.66 ± 1.38 | <.001 |
5-min | 6.95 ± 1.66 | 3.51 ± 2.11 | <.001 |