| Variables | B | S.E. | P Value | OR | 95% C.I. for | |
| Upper | Lower | |||||
| Number of pregnancy 1 | −0.681 | 0.604 | 0.260 | 0.506 | 1.655 | 0.155 |
| Number of pregnancy 2 | −0.939 | 0.549 | 0.087 | 0.391 | 1.147 | 0.133 |
| Number of pregnancy 3 | −0.776 | 0.551 | 0.159 | 0.460 | 1.354 | 0.156 |
| Pregnancy age | 1.212 | 0.522 | 0.020 | 3.361 | 9.341 | 1.209 |
| Hospital type of delivery | −0.197 | 0.354 | 0.578 | 0.821 | 1.643 | 0.410 |
| Spouse education 1 | 1.340 | 0.646 | 0.038 | 3.818 | 13.546 | 1.076 |
| Spouse education 2 | 0.607 | 0.390 | 0.119 | 1.836 | 3.941 | 0.855 |
| Spouse education 3 | 0.335 | 0.542 | 0.537 | 1.398 | 4.046 | 0.483 |
| Mother education 2 | −0.209 | 0.380 | 0.583 | 0.812 | 1.709 | 0.385 |
| Number of abortion | 0.322 | 0.406 | 0.428 | 1.379 | 3.056 | 0.623 |
| Infection with underlying disease | 1.616 | 0.303 | 0. 000 | 5.032 | 9.119 | 2.776 |
| Delivery agent | 0.457 | 0.506 | 0.367 | 1.580 | 4.262 | 0.585 |
| Intentionality of pregnancy | 0.057 | 0.392 | 0.885 | 1.058 | 2.283 | 0.491 |
| Delivery type | −1.116 | 0.410 | 0.006 | 0.327 | 0.731 | 0.147 |
| Appropriate prenatal care | −0.225 | 0.310 | 0.469 | 0.799 | 1.467 | 0.435 |