Table 3.
Neonatal morbidity in first and second twins in twin deliveries after 32 completed gestational weeks and with vaginal delivery of the first twin
| First twin N = 527 |
Second twin N = 527 |
p-value | |
|---|---|---|---|
| Composite primary outcomea | 4 (0.7) | 14 (2.7) | 0.029 |
| Apgar score < 4, 5 minb | 0 | 2 (0.4) | 1.0 |
| pH < 7.05 and BE< −12 or pH < 7.00c | 4 (1.0) | 12 (2.8) | 0.08 |
| Perinatal mortality < 7 days | 0 | 2 (0.4) | 0.50 |
| Neonatal mortality < 28 days | 0 | 0 | 1.0 |
| Composite secondary outcomea | 68 (12.9) | 92 (17.4) | 0.048 |
| Apgar score < 7, 5 min | 4 (0.8) | 9 (1.7) | 0.46 |
| pH < 7.10 | 5 (1.2) | 40 (9.4) | < 0.0001 |
| Admitted to NICU | 129 (24.5) | 123 (23.3) | 0.72 |
| NICU, mean (SD), median, (range) days | 11 (7.3) 10 (1–35) |
11 (7.0) 10 (1–37) |
1.0 |
| NICU > 7 days | 81 (15.4) | 76 (14.4) | 0.90 |
| IRDS | 1 (0.2) | 5 (0.9) | 0.23 |
| TTN | 8 (1.5) | 10 (1.9) | 0.81 |
| IVH | 0 | 0 | 1.0 |
| Septicemia | 3 (0.6) | 2 (0.4) | 1.0 |
| NEC | 0 | 1 (0.2) | 1.0 |
| Convulsions | 0 | 0 | 1.0 |
| HIE | 0 | 0 | 1.0 |
| Assisted ventilation | 26 (4.9) | 30 (5.7) | 0.68 |
Values are n (%), unless otherwise stated
BE Base Excess, NICU Neonatal Intensive Care Unit, IRDS Infant Respiratory Distress Syndrome, TTN Transient Tachypnea of the Newborn, IVH Intraventricular Hemorrhage, NEC Necrotizing Enterocolitis, HIE Hypoxic Ischemic Encephalopathy
aas defined in Material and Methods
bThere were missing Apgar score in first twin (n = 5) and second twin (n = 3)
cThere was missing pH values in first twin (n = 121) and second twin (n = 101)