Table 1.
Baseline characteristics in women with twin deliveries after 32 completed gestational weeks and with vaginal delivery of the first twin
| Twin deliveries N = 527 |
|
|---|---|
| Maternal age, years, mean (SD) median (range) | 32.5 (4.8), 32.7 (17.5–51.4) |
| ≥35 years | 145 (27.5) |
| Nulliparous | 202 (38.3) |
| Previous cesarean section | 22 (4.2) |
| Body Mass Index, mean (SD) median (range) | 24.2 (4.2) 23.4 (16–43) n = 452 |
| Body Mass Index ≥35a | 13/452 (2.8) |
| Smoking at first antenatal visita | 20/436 (4.6) |
| Chronic hypertension | 2 (0.4) |
| Gestational hypertension | 2 (0.4) |
| Preeclampsia | 46 (8.7) |
| Diabetes mellitus type 1 or 2 | 1 (0.2) |
| Gestational diabetes mellitus | 6 (1.1) |
| Dichoriotic/diamniotic twin gestationsb | 386/501 (77.0) |
| Monochoriotic/diamniotic twin gestationsb | 115/501 (23.0) |
| Pregnancies with twin-twin transfusion syndrome | 2 (0.4) |
| Mode of delivery of the second twin | |
| Spontaneous cephalic | 288 (54.6) |
| Spontaneous breech | 123 (23.3) |
| Breech extraction | 9 (1.7) |
| Vacuum extraction | 72 (13.7) |
| Cesarean section | 35 (6.6) |
Values are n (%), unless otherwise stated
aThere were missing values on Body Mass Index, smoking
bChorionicity was unknown in 26 deliveries