Characteristics of mothers and live births between 2010 and 2013 by country
| Ontario (n=253 930) | England (n=1 361 128) | ||||
| N | % | N | % | ||
| Gestational age group | Full term (39+ weeks) | 170 445 | 67.1 | 1 047 532 | 77.0 |
| Early term (37–38 weeks) | 69 349 | 27.3 | 250 029 | 18.4 | |
| Late preterm (34–36 weeks) | 14 136 | 5.6 | 63 567 | 4.7 | |
| Birth weight | <1500 | 140 | 0.1 | 1125 | 0.1 |
| 1500–<2500 | 10 817 | 4.3 | 63 319 | 4.7 | |
| 2500–<4000 | 216 777 | 85.4 | 1 141 544 | 83.9 | |
| 4000+ | 26 196 | 10.3 | 155 140 | 11.4 | |
| Size for gestation | Small (<10th percentile) | 25 825 | 10.2 | 120 322 | 8.8 |
| Normal | 204 271 | 80.4 | 1 103 893 | 81.1 | |
| Large (>10th percentile) | 23 834 | 9.4 | 136 913 | 10.1 | |
| Maternal age (years) | <20 | 9439 | 3.7 | 78 659 | 5.8 |
| 20–24 | 31 974 | 12.6 | 255 986 | 18.9 | |
| 25–29 | 70 759 | 27.9 | 375 835 | 27.7 | |
| 30–34 | 85 016 | 33.5 | 385 700 | 28.4 | |
| 35–39 | 45 448 | 17.9 | 207 269 | 15.3 | |
| 40+ | 11 291 | 4.4 | 54 021 | 4.0 | |
| Female infant | 123 937 | 48.8 | 663 798 | 48.8 | |
| Multiple birth | 4618 | 1.8 | 19 973 | 1.5 | |
| Primiparous mother | 133 167 | 52.4 | 661 402 | 48.6 | |
| Income/deprivation quintile | Most deprived: 1 | 55 945 | 22.0 | 266 211 | 19.8 |
| 2 | 50 818 | 20.0 | 269 664 | 20.1 | |
| 3 | 50 472 | 19.9 | 268 799 | 20.0 | |
| 4 | 51 914 | 20.4 | 270 125 | 20.1 | |
| Least deprived: 5 | 39 121 | 15.4 | 267 068 | 19.9 | |
| Newborn length of stay (days) | <2 | 97 728 | 38.5 | 727 461 | 53.5 |
| 2–6 | 147 294 | 58.0 | 577 452 | 42.4 | |
| 7+ | 8908 | 3.5 | 56 215 | 4.1 | |
| Caesarean section | 74 067 | 29.2 | 319 194 | 23.5 | |
| Neonatal ICU | 26 463 | 10.4 | 148 957 | 10.9 | |
| Delivery risk factor (Any) | 33 959 | 13.4 | 37 062 | 10.1 | |
| Hypoxia | 1242 | 0.5 | 78 894 | 5.8 | |
| Amniotic fluid embolism | 14 | 0.0 | 18 | 0.0 | |
| Placental transfusion syndrome | 61 | 0.0 | 203 | 0.0 | |
| Umbilical cord prolapse | 27 780 | 10.9 | 19 374 | 1.4 | |
| Chorioamnionitis | 2270 | 0.9 | 2412 | 0.2 | |
| Fetal haemorrhage | 358 | 0.1 | 5783 | 0.4 | |
| Birth trauma | 1748 | 0.7 | 39 313 | 2.9 | |
| Complications of delivery | 1688 | 0.7 | 18 244 | 1.3 | |
| Umbilical cord problem | 888 | 0.3 | 2871 | 0.2 | |
| Pregnancy risk factor (Any) | 31 103 | 12.2 | 49 687 | 11.0 | |
| Previous intrauterine fetal death | 21 | 0.0 | 139 | 0.0 | |
| Eclampsia | 2858 | 1.1 | 31 084 | 2.3 | |
| Gestational hypertension | 11 911 | 4.7 | 79 576 | 5.9 | |
| Diabetes in pregnancy | 15 405 | 6.1 | 53 170 | 3.9 | |
| Placental abruption or infarction | 3211 | 1.3 | 14 468 | 1.1 | |
| Uterine rupture | 226 | 0.1 | 679 | 0.1 | |
| Neonatal medical condition (Any) | 10 478 | 4.1 | 59 818 | 4.4 | |
| Congenital anomaly | 5884 | 2.3 | 24 763 | 1.8 | |
| Perinatal infection | 1876 | 0.7 | 29 093 | 2.1 | |
| Neonatal abstinence syndrome | 1024 | 0.4 | 2504 | 0.2 | |
| Respiratory distress syndrome | 2924 | 1.2 | 9405 | 0.7 | |
ICU, intensive care unit.