|
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
|
- aCould not be calculated for 25 infants (20 with no extensive resuscitation, 5 with extensive resuscitation) due to gestational age being out of range for the growth chart used
- bNot collected for 804 infants (770 with no extensive resuscitation, 34 with extensive resuscitation)
