Table 4.
Numbers and rates of women with severe maternal morbidity by maternal and clinical characteristics, Canada (excluding Quebec), 2012‐2016
| Maternal characteristics | Number of deliveries | Severe maternal morbidity | ||
|---|---|---|---|---|
| Number | Rate per 10 000 deliveries (95% CI) | Rate Ratio (95% CI) | ||
| Age (years) | ||||
| <15 | 307 | 5 | 162.9 (53.1, 376.0) | 1.09 (0.46, 2.60) |
| 15‐19 | 43 862 | 824 | 187.9 (175.4, 201.0) | 1.25 (1.16, 1.35) |
| 20‐24 | 184 064 | 2757 | 149.8 (144.3, 155.4) | 1.00 (Reference) |
| 25‐29 | 403 695 | 5592 | 138.5 (134.9, 142.2) | 0.92 (0.88, 0.97) |
| 30‐34 | 491 668 | 7395 | 150.4 (147.0, 153.8) | 1.00 (0.96, 1.05) |
| 35‐39 | 242 526 | 4644 | 191.5 (186.1, 197.0) | 1.28 (1.22, 1.34) |
| ≥40 | 52 423 | 1582 | 301.8 (287.3, 316.8) | 2.01 (1.90, 2.14) |
| Parity | ||||
| 0 | 491 931 | 9819 | 199.6 (195.7, 203.6) | 1.67 (1.62, 1.73) |
| 1 | 388 503 | 4636 | 119.3 (115.9, 122.8) | 1.00 (Reference) |
| 2 | 154 894 | 2112 | 136.4 (130.6, 142.3) | 1.14 (1.09, 1.20) |
| 3 | 54 132 | 845 | 156.1 (145.8, 166.9) | 1.31 (1.22, 1.41) |
| 4 | 19 904 | 355 | 178.4 (160.4, 197.7) | 1.49 (1.34, 1.66) |
| ≥5 | 18 252 | 366 | 200.5 (180.7, 221.9) | 1.68 (1.51, 1.87) |
| Missing | 290 929 | 4666 | 160.4 (155.8, 165.0) | 1.34 (1.29, 1.40) |
| Elderly primigravida | ||||
| Yes | 17 189 | 577 | 335.7 (309.3, 363.7) | 2.12 (1.95, 2.30) |
| No | 1 401 356 | 22 222 | 158.6 (156.5, 160.7) | 1.00 (Reference) |
| Previous caesarean delivery | ||||
| Yes | 199 829 | 4264 | 213.4 (207.1, 219.8) | 1.40 (1.36, 1.45) |
| No | 1 218 716 | 18 535 | 152.1 (149.9, 154.3) | 1.00 (Reference) |
| Epidural anaesthesia | ||||
| Yes | 640 186 | 8029 | 125.4 (122.7, 128.2) | 0.66 (0.64, 0.68) |
| No | 778 359 | 14 770 | 189.8 (186.7, 192.8) | 1.00 (Reference) |
| Labour induction | ||||
| Yes | 370 175 | 7714 | 208.4 (203.8, 213.0) | 1.45 (1.41, 1.49) |
| No | 1 048 370 | 15 085 | 143.9 (141.6, 146.2) | 1.00 (Reference) |
| Caesarean delivery | ||||
| Yes | 404 319 | 13 744 | 339.9 (334.4, 345.6) | 3.81 (3.71, 3.91) |
| No | 1 014 226 | 9055 | 89.3 (87.5, 91.1) | 1.00 (Reference) |
| Plurality | ||||
| Singleton | 1 394 775 | 21 402 | 153.4 (151.4, 155.5) | 1.00 (Reference) |
| Twin | 23 326 | 1348 | 577.9 (548.3, 608.6) | 3.77 (3.57, 3.97) |
| Triplet or higher‐order | 443 | 48 | 1083.5 (809.8, 1410.8) | 7.06 (5.40, 9.23) |
| Total | 1 418 545 | 22 799 | 16.1 (15.9, 16.3) | ‐ |