Women <35 | Women ≥35 | ||
---|---|---|---|
(n = 15 437) | (n = 2387) | P | |
Prior termination | 3237 (21.0) | 812 (34.0) | <0.001 |
Pregravid BMI >25 kg/m2 | 2201 (41.6) | 470 (56.2) | <0.001 |
Late pregnancy bleeding | 215 (1.4) | 45 (1.9) | 0.062 |
Placenta previa | 29 (0.2) | 11 (0.5) | 0.009 |
Fertility treatment other than IVF | 274 (1.8) | 154 (6.5) | <0.001 |
IVF | 291 (1.9) | 184 (7.7) | <0.001 |
Anemia | 91 (0.6) | 14 (0.6) | 0.986 |
Smoking | 2196 (14.2) | 226 (9.5) | <0.001 |
Not married | 7346 (47.6) | 1128 (47.3) | 0.058 |
Chronic hypertension | 177 (1.1) | 49 (2.1) | <0.001 |
Maternal diabetes | 753 (4.9) | 221 (9.3) | <0.001 |