N | Cases | OR (95% C.I.) | ||
---|---|---|---|---|
Parity | 1 | 334 396 | 532 | 1 |
2 | 281 002 | 410 | 0.9 (0.7–1.1) | |
3 | 130 463 | 195 | 0.9 (0.8 -1.1) | |
4+ | 58 993 | 111 | 1.2 (1.0–1.5) | |
Multiple birth | Yes | 18 738 | 100 | 3.7 (3.0–4.5) |
Gestational age (weeks) | 22–28 | 1 798 | 107 | 60.4 (49.2–74.5) |
29–32 | 6 457 | 184 | 27.6 (23.5–32.5) | |
33–36 | 40 148 | 134 | 3.1 (2.6–3.7) | |
37–41 | 747 172 | 799 | 1 | |
42–45 | 9 279 | 17 | 1.7 (1.1–2.8) | |
Small for gestational age | Yes | 25 427 | 133 | 3.7 (3.1–4.4) |
Preeclampsia | Yes | 21 329 | 62 | 1.9 (1.5–2.5) |
Abrubtio placentae | Yes | 3 778 | 60 | 10.9 (8.4–14.1) |
Apgar<7 at 5 min | Yes | 7 343 | 242 | 27.0 (23.5–31.2) |
Neonatal distress | Yes | 11 611 | 221 | 15.0 (12.9–17.4) |
Total | 804 854 | 1 248 |