Table 1: Patient characteristics, by number of prior vaginal deliveries and planned mode of birth .
|
|
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).