Variables | Respiratory | Other causes | p* | ||
---|---|---|---|---|---|
 | n | % | n | % |  |
Gestational age at delivery (weeks)a | Â | Â | Â | <0.001 | |
  < 22 | 20 | 4.5 | 307 | 3.6 |  |
 22–27 | 23 | 5.2 | 259 | 3.0 |  |
 28–33 | 83 | 18.8 | 1341 | 15.6 |  |
 34–36 | 56 | 12.7 | 1724 | 20.1 |  |
  ≥ 37 | 95 | 21.5 | 4427 | 51.7 |  |
 Still pregnant | 164 | 37.2 | 511 | 6.0 |  |
Mode of deliveryb | Â | Â | Â | Â | <0.001 |
 Vaginal | 58 | 12.1 | 2080 | 23.0 |  |
 C-section | 233 | 48.5 | 5921 | 65.5 |  |
 Abortion/ ectopic pregnancy | 24 | 5.0 | 521 | 5.8 |  |
 Still pregnant | 165 | 34.4 | 512 | 5.7 |  |
Onset of laborc | Â | Â | Â | Â | <0.001 |
 Spontaneous | 66 | 14.1 | 2652 | 29.6 |  |
 Induction | 33 | 7.1 | 792 | 8.8 |  |
 No labor | 179 | 38.3 | 4477 | 50.0 |  |
 Abortion | 24 | 5.1 | 521 | 5.8 |  |
 Still pregnant | 165 | 35.3 | 513 | 5.7 |  |
Perinatal results | Â | Â | Â | Â | Â |
 Apgar at 5 min <7d | 38 | 17.7 | 258 | 3.5 | <0.001 |
 Apgar at 5 min ≥7 | 177 | 82.3 | 7152 | 96.5 |  |
 Birth weight <2500 ge | 142 | 58.9 | 3007 | 39.1 | <0.001 |
 Birth weight ≥2500 g | 99 | 41.1 | 4675 | 60.9 |  |
 Still birthf | 36 | 13.6 | 352 | 4.5 | <0.001 |
 Live birth | 229 | 86.4 | 7504 | 95.5 |  |
Perinatal outcomeg | Â | Â | Â | Â | <0.001 |
 Neonatal death | 15 | 7.0 | 178 | 2.5 |  |
 Admitted/ transferred | 83 | 38.6 | 1547 | 21.4 |  |
 Hospital discharge | 117 | 54.4 | 5506 | 76.1 |  |