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Case control studies: pre-eclampsia
| Risk factor | No of studies | No of women | Unadjusted relative risk (95% CI) | I2 |
|---|---|---|---|---|
| Previous pre-eclampsia | 715,16,18,19,24,25 | 22 352 | 7.61 (4.30 to 13.47) | 65.7% |
| Family history in mother | 129 | 262 | 3.60 (1.49 to 8.67) | — |
| Nulliparity | 610,15-19 | 304 559 | 2.35 (1.80 to 3.06) | 97.3% |
| Antiphospholipid antibodies | 340-42 | 760 | 6.12 (0.35 to 108.35) | 81.5% |
