TABLE 1.
Characteristics of the study cohort, n = 1573. The data are presented as median [range] or n (%)
| Maternal age, years | 30.0 | [14‐46] |
| <20 | 43 | (2.7) |
| ≥35 | 322 | (20.5) |
| Maternal BMI, kg/m2 | 23.2 | [15.4‐50.0] |
| <18.5 | 56/1342 | (4.2) |
| ≥30.0 | 166/1342 | (12.4) |
| Maternal smoking | 222/1431 | (15.5) |
| Nullipara | 944 | (60.0) |
| Male sex | 785 | (49.9) |
| Gestational age at delivery, weeks + days | 37+6 | [32+0‐41+6] |
| 32‐33 | 140 | (8.9) |
| 34‐36 | 385 | (24.5) |
| 37‐39 | 851 | (54.1) |
| 40‐41 | 197 | (12.5) |
| Delivery start spontaneous | 814 | (51.8) |
| Induction of labor | 427 | (27.2) |
| CS before delivery start | 332 | (21.1) |
| Mode of delivery spontaneous vaginal | 755 | (48.6) |
| Operative vaginal | 49 | (3.2) |
| Emergency CS | 572 | (36.8) |
| Elective CS | 177 | (11.4) |
| Missing | 20 | |
| Interval Doppler examination to delivery, days | 3 | [0‐13] |
| Apgar score at 5 min | 10 | [0‐10] |
| 0‐3 | 13 | (0.8) |
| 4‐6 | 31 | (2.0) |
| 7‐10 | 1515 | (97.2) |
| Missing | 14 | |
| Birthweight, g | 2495 | [1025‐5242] |
Abbreviations: BMI, body mass index; CS, cesarean section.