Table 1 Baseline characteristics of the study cohort, stratified by severe neonatal outcomes
| Â | Severe neonatal outcomes | |
|---|---|---|
| Â | No | Yes |
Race (0 missing) | ||
 Yellow | 821 | 180 |
 Mother’s age, years, mean (SD) (1 missing) | 30.68 ± 4.58 | 30.57 ± 4.50 |
 Latency, days (0 missing) | 1.95 ± 3.08 | 3.46 ± 4.22 |
 GA at PPROM, weeks, mean (SD) (0 missing) | 34.98 ± 2.09 | 31.83 ± 2.93 |
 GA at delivery, weeks, mean (SD) (1 missing) | 35.23 ± 1.93 | 32.29 ± 2.74 |
Nulliparity (0 missing) | ||
 No | 353 | 88 |
 Yes | 468 | 92 |
Gestational diabetes (0 missing) | ||
 No | 661 | 147 |
 Yes | 160 | 33 |
Hypertensive disorders of pregnancy (0 missing) | ||
 No | 799 | 176 |
 Yes | 22 | 4 |
Clinical or subclinical chorioamniotis (0 missing) | ||
 Yes | 209 | 80 |
 No | 612 | 100 |
Amniotic fluid pollution (31 missing) | ||
 Yes | 31 | 10 |
 No | 773 | 159 |
Use of antenatal corticosteroids (0 missing) | ||
 Yes | 321 | 97 |
 No | 500 | 83 |
Neonates’ Gender (0 missing) | ||
 Female | 353 | 79 |
 Male | 468 | 101 |
 Neonates’ Birthweight (0 missing) | 2528.4 ± 515.9 | 1888.7 ± 577.8 |
Use of surfactant on the 1st day (0 missing) | ||
 Yes | 2 | 49 |
 No | 819 | 131 |
Respiratory support | ||
 None | 766 | 86 |
 Oxygen therapy | 10 | 4 |
 Normal frequency ventilation | 41 | 69 |
 High-frequency ventilation | 4 | 21 |