Characteristics of women with and without a maternal placental syndrome (MPS) in the index pregnancy
| Characteristics | MPS (n=75 242) | No MPS (n=1 055 522) |
| During the index delivery hospitalisation | ||
| Mean (SD) maternal age, years | 29.7 (5.8) | 29.4 (5.5) |
| Maternal age, years | ||
| 14–15 | 159 (0.21) | 2025 (0.19) |
| 16–19 | 3459 (4.6) | 48 705 (4.6) |
| 20–24 | 10 656 (14.2) | 155 905 (14.8) |
| 25–29 | 21 530 (28.6) | 310 716 (29.4) |
| 30–34 | 23 617 (31.4) | 348 466 (33.0) |
| 35–39 | 12 749 (16.9) | 160 227 (15.2) |
| 40–44 | 2900 (3.9) | 28 423 (2.7) |
| 45–50 | 172 (0.23) | 1055 (0.10) |
| Income quintile | ||
| 1 | 17 023 (22.6) | 245 105 (23.2) |
| 2 | 15 654 (20.8) | 217 631 (20.6) |
| 3 | 15 372 (20.4) | 210 595 (20.0) |
| 4 | 14 926 (19.8) | 206 631 (19.6) |
| 5 | 11 843 (15.7) | 169 494 (16.1) |
| Living in a rural area | 9387 (12.5) | 116 381 (11.0) |
| Multiple gestation | 3661 (4.9) | 16 719 (1.6) |
| Gestational hypertension | 31 549 (41.9) | 0 (0.0) |
| Pre-eclampsia | 26 655 (35.4) | 0 (0.0) |
| Placental abruption | 10 935 (14.5) | 0 (0.0) |
| Placental infarction | 8844 (11.8) | 0 (0.0) |
| Poor fetal growth or small for dates | 5946 (7.9) | 21 134 (2.0) |
| Intrauterine fetal death | 56 (0.07) | 228 (0.02) |
| Preterm delivery <37 weeks' gestation | 15 785 (21.0) | 56 717 (5.4) |
| Mean (SD) gestational age at delivery | 37.6 (2.9) | 39.0 (1.9) |
| Mean (SD) length of stay, days | 4.3 (4.2) | 2.7 (2.3) |
| ≤365 days before the index delivery hospitalisation | ||
| Chronic hypertension | 15 395 (20.5) | 24 751 (2.3) |
| Any diabetes mellitus* | 6974 (9.3) | 56 034 (5.3) |
| Obesity | 2363 (3.1) | 15 263 (1.4) |
| Dyslipidaemia | 628 (0.83) | 6930 (0.66) |
| Metabolic syndrome | ||
| 1 Feature | 18 708 (24.9) | 89 488 (8.5) |
| 2 Features | 2994 (4.0) | 6166 (0.58) |
| 3 Features | 216 (0.29) | 362 (0.03) |
| 4 Features | 4 (0.01) | 18 (0.00) |
| Drug dependence or tobacco use | 1015 (1.3) | 11 111 (1.1) |
| >365 days after the index delivery hospitalisation | ||
| Chronic hypertension | 21 704 (28.8) | 118 641 (11.2) |
| Thyroid disease | 6096 (8.1) | 83 159 (7.9) |
| Coronary artery disease | 5242 (6.97) | 55 124 (5.22) |
All data are presented as number (%), unless otherwise specified.
↵* Pregestational or gestational diabetes mellitus, including that diagnosed during the index delivery hospitalisation.