Antenatal and birth characteristics
|
GA, weeks and days
|
29 [26, 30]
|
29 [27, 30]
|
29 [27, 30]
|
< 0.001
|
24 weeks (and 0 days)–28 weeks (and 6 days)
|
2634 (49.6%)
|
3198 (44.2%)
|
682 (43.8%)
|
< 0.001
|
29 weeks (and 0 days)–31 weeks (and 6 days)
|
2680 (50.4%)
|
4040 (55.8%)
|
874 (56.2%)
|
Male
|
2908/5304 (54.8%)
|
3974/7233 (54.9%)
|
766 (49.9%)
|
< 0.001
|
Missing
|
10
|
5
|
3
| |
Singleton
|
3644 (68.6%)
|
5095 (70.4%)
|
1189 (76.5%)
|
< 0.001
|
Missing
|
0
|
1
|
1
| |
Small gestational age
|
545 (10.3%)
|
541 (7.5%)
|
277 (17.8%)
|
< 0.001
|
Missing
|
8
|
5
|
3
| |
Maternal chorioamnionitis
|
995 (23.5%)
|
1046 (21.0%)
|
168 (15.0%)
|
< 0.001
|
Missing
|
1085
|
2264
|
439
| |
Antenatal corticosteroids
|
5127 (96.9%)
|
5827 (81.7%)
|
1477 (95.8%)
|
< 0.001
|
Missing
|
23
|
108
|
14
| |
Outborn
|
299 (5.6%)
|
1484 (20.5%)
|
128 (8.2%)
|
< 0.001
|
Missing
|
0
|
6
|
2
| |
Delivered by caesarean
|
3082 (58.1%)
|
4260 (59.0%)
|
1119 (72.2%)
|
< 0.001
|
Missing
|
7
|
13
|
5
| |
Intensive resuscitation
|
1630 (30.9%)
|
2828 (39.6%)
|
466 (30.3%)
|
< 0.001
|
Missing
|
33
|
91
|
19
| |
Adjusted OR (vs no use)*
|
0.63 [0.54, 0.73]
|
Reference
|
–
|
< 0.001
|
Adjusted OR (vs other use)*
|
0.81 [0.66, 0.99]
|
–
|
Reference
|
0.04
|