Factors | Preterm Cases (%) | No Preterm (%) | P value | OR | 95% CI |
---|---|---|---|---|---|
 | N=181 | N=1445 |  |  |  |
Induced abortion history | Â | Â | Â | Â | Â |
· 0 | 61 (33.0) | 566 (39.0) |  | 1.0 | 1.0 |
· 1 | 64 (35.0) | 476 (32.0) | 0.28 | 1.3 | 0.85 – 1.84 |
· ≥ 2 | 56 (30.0) | 403 (27.0) | 0.23 | 1.3 | 0.86 – 1.93 |
Spontaneous abortion | Â | Â | Â | Â | Â |
· 0 | 145 (80.1) | 1175 (81.3) |  | 1.0 | 1.0 |
· 1 | 27 (14.9) | 198 (10.3) | 0.7 | 1.1 | 0.70 – 1.74 |
· ≥ 2 | 9 (5.7) | 92 (4.9) | 0.6 | 0.8 | 0.37 – 1.66 |
Preterm delivery | Â | Â | Â | Â | Â |
· Yes | 9 (5.0) | 41 (2.8) | 0.8 | 1.8 | 0.80 – 3.91 |
· No | 172 (95.0) | 1404 (97.2 ) |  | 1.0 | 1.0 |
Operative vaginal delivery | Â | Â | Â | Â | Â |
· Yes | 11 (6.1) | 56 (3.9) | 0.2 | 1.0 | 1.0 |
· No | 170 (97) | 1389 (96.1) |  | 1.6 | 0.78 –3.24 |