| Intervention Group (N = 5498) | Control group (N = 5254) |
---|---|---|
Hospitals | ||
 Type of hospital, no. (%) | ||
  Tertiary hospitals | 1941 (35.3) | 1813 (34.5) |
  Secondary hospitals | 3557 (64.7) | 3441 (65.5) |
Patients | ||
 Maternal age at delivery, years | ||
  < 18 years, no. (%) | 12 (0.2) | 19 (0.4) |
  18–34 years, no. (%) | 4842 (89.9) | 4686 (90.1) |
  ≥ 35 years, no. (%) | 533 (9.9) | 494 (9.5) |
  Missing | 111 | 55 |
 Pre-pregnancy body mass index, kg/m2 | 22.0 ± 3.2 | 22.3 ± 3.3 |
 Parity, no. (%) | ||
  0 | 3546 (64.5) | 3399 (64.7) |
  1 | 1828 (33.3) | 1715 (32.7) |
  ≥ 2 | 121 (2.2) | 137 (2.6) |
  Missing | 3 | 3 |
 Gestational age at delivery, no. (%) | ||
  <  37 weeks | 312 (5.7) | 292 (5.6) |
  37–41 weeks | 5167 (94.0) | 4948 (94.2) |
  ≥ 42 weeks | 19 (0.4) | 14 (0.3) |
 Previous cesarean deliveries, no. (%) | ||
  No | 4722 (86.0) | 4516 (86.1) |
  Yes | 768 (14.0) | 727 (13.9) |
  Missing | 8 | 11 |
 Risk level of pregnancy, no. (%) | ||
  Low | 2830 (51.5) | 2671 (50.8) |
  High | 2668 (48.5) | 2583 (49.2) |
 Presentation of the baby | ||
  Cephalic | 5088 (94.7) | 4964 (95.7) |
  Breech/transverse/oblique lie | 284 (5.3) | 222 (4.3) |
  Missing | 126 | 68 |
 Mode of delivery | ||
  Vaginal delivery | 3034 (55.2) | 3003 (57.2) |
  Assisted vaginal delivery | 128 (2.3) | 70 (1.3) |
  Planned cesarean delivery | 2000 (36.4) | 1855 (35.3) |
  Intrapartum cesarean delivery | 336 (6.1) | 326 (6.2) |
 Birth outcome | ||
  Live birth | 5479 (99.7) | 5236 (99.7) |
  Fetal death | 14 (0.3) | 13 (0.3) |
  Stillbirth | 1 (0.02) | 2 (0.04) |
  Neonatal death | 4 (0.07) | 3 (0.06) |
 Neonatal birthweight, g | ||
  < 1500, no. (%) | 16 (0.3) | 17 (0.3) |
  1500–2499, no. (%) | 185 (3.4) | 191 (3.6) |
  2500–3999, no. (%) | 4901 (89.2) | 4663 (88.8) |
  ≥ 4000, no. (%) | 395 (7.2) | 383 (7.3) |
  Missing | 1 | 0 |