| No previous vaginal births | ≥ 1 Previous vaginal births | |||||||
|---|---|---|---|---|---|---|---|---|
| Characteristic | Planned vaginal, no. (%)* n = 7 614 | Planned CS, no. (%)* n = 20 792 | Planned vaginal, no. (%)* n = 3 726 | Planned CS, no. (%)* n = 1 680 | ||||
| Maternal age, yr | ||||||||
| < 20 | 62 | (0.8) | 102 | (0.5) | 10 | (0.3) | 0 | |
| 20–24 | 692 | (9.1) | 1 514 | (7.3) | 207 | (5.5) | 76 | (4.5) |
| 25–29 | 1 935 | (25.4) | 4 513 | (21.7) | 887 | (23.8) | 365 | (21.7) |
| 30–34 | 3 001 | (39.4) | 7 725 | (37.1) | 1 329 | (35.7) | 604 | (36.0) |
| 35–39 | 1 688 | (22.2) | 5 669 | (27.3) | 1 013 | (27.2) | 474 | (28.2) |
| 40–55 | 236 | (3.1) | 1 269 | (6.1) | 280 | (7.5) | 161 | (9.6) |
| BMI | ||||||||
| Normal or underweight | 3 703 | (65.9)† | 7 419 | (57.5)‡ | 1 504 | (60.8)§ | 514 | (53.5)¶ |
| Overweight | 1 290 | (22.9)† | 3 162 | (24.5)‡ | 568 | (23.0)§ | 244 | (25.4)¶ |
| Obese | 630 | (11.2)† | 2 327 | (18.0)‡ | 401 | (16.2)§ | 202 | (21.0)¶ |
| Unknown | 1 991 | (26.1) | 7 884 | (37.9) | 1 253 | (33.6) | 720 | (42.9) |
| Previous cesarean | ||||||||
| 1 | 7 504 | (98.6) | 16 913 | (81.3) | 3 623 | (97.2) | 1 406 | (83.7) |
| 2 | 110 | (1.4) | 3 879 | (18.7) | 103 | (2.8) | 274 | (16.3) |
| Augmentation of labour prostaglandins | ||||||||
| Oxytocin | 1 171 | (15.4) | 0 | 368 | (9.9) | 0 | ||
| Induction of labour | ||||||||
| Oxytocin | 609 | (8.0) | 0 | 350 | (9.4) | 0 | ||
| Prostaglandin | 283 | (3.7) | 0 | 175 | (4.7) | 0 | ||
| Both | 54 | (0.7) | 0 | 19 | (0.5) | 0 | ||
| Hospital size, births/yr | ||||||||
| 1–49 | 23 | (0.3) | 108 | (0.5) | 18 | (0.5) | 11 | (0.7) |
| 50–249 | 480 | (6.3) | 1 289 | (6.2) | 303 | (8.1) | 125 | (7.4) |
| 250–999 | 1 293 | (17.0) | 3 069 | (14.8) | 784 | (21.0) | 322 | (19.2) |
| 1000–2499 | 2 199 | (28.9) | 6 827 | (32.8) | 1 097 | (29.4) | 514 | (30.6) |
| > 2500 | 3 530 | (46.4) | 9 449 | (45.4) | 1 453 | (39.0) | 705 | (42.0) |
| Home birth | 33 | (0.4) | 0 | 28 | (0.8) | 0 | ||
| Single parent | 178 | (2.3) | 560 | (2.7) | 123 | (3.3) | 54 | (3.2) |
| Birth weight, g; mean ± SD | 3 552 ± 463 | 3 500 ± 450 | 3 584 ± 493 | 3 501 ± 487 | ||||
Note: BMI = body mass index, CS = cesarean section, SD = standard deviation. *Unless otherwise specified. †Unknown BMI value not included in total for calculation of percentage (n = 5 623). ‡Unknown BMI value not included in total for calculation of percentage (n =12 908). §Unknown BMI value not included in total for calculation of percentage (n = 2 473). ¶Unknown BMI value not included in total for calculation of percentage (n = 960).