| Table 4. Multivariate analysis of risk factors for preterm birth in the present study. | ||||
| Variable | Multivariate analysis | p-value | ||
|---|---|---|---|---|
| OR | 95% CI | |||
| Pre-eclampsia | 4.863 | 3.415 | 6.925 | <0.001 |
| Gestational hypertension | 2.050 | 1.715 | 2.450 | <0.001 |
| Polyhydramnios | 2.592 | 1.394 | 4.820 | .003 |
| Chorioamnionitis | 47.272 | 6.385 | 349.968 | <0.001 |
| Antepartum hemorrhage | 9.847 | 5.002 | 19.384 | <0.001 |
| Placenta previa | 3.082 | 1.682 | 5.647 | <0.001 |
| Oligohydramnios | 2.649 | 2.027 | 3.462 | <0.001 |
| Mode of conception (IVF vs. SC) | 4.004 | 3.496 | 4.587 | <0.001 |