| Obstetric Complications | Cases | Controls | p | OR - IC | ||
| N | % | n | % | |||
| Evacuations Premature rupture of membranes | 294 243 | 41.5 34.3 | 267 88 | 14.2 79.9 | 10−9 10−9 | 2.2 [1.8 - 2.7] 2.3 [1.9 - 2.9] |
| Post maturity Low birth weight | 244 | 34.4 | 203 | 18.4 | 10−9 | 1.7 [1.4 - 2.1] |
| 674 | 95.1 | 693 | 62.8 | 10−9 | 11.4 [7.9 - 16.3] | |
| Hypertensive disorders Malposition Uterine rupture Fetal death Anemia IPPH Puerperal Infection | 85 142 47 142 108 34 65 | 12.0 20.0 6.6 20.0 15.2 4.8 9.2 | 36 158 11 158 22 12 9 | 3.3 14.3 1.0 14.3 2.0 1.0 0.8 | 10−9 0.001 10−9 0.001 10−9 10−7 10−9 | 4.0 [2.7 - 6.0] 1.5 [1.2 - 1.9] 7.0 [3.6 - 13.7] 1.5 [1.2 - 1.9] 8.8 [5.5 - 14.12] 4.6 [2.4 - 8.9] 12.3 [6.1 - 24.8] |