| Variables | Categories | Complcations N = 37 n (%) | No complications N = 29 n (%) | OR (95% CI) | P |
| Placentation of twins | Monochorial BA | 7 (18.9) | 8 (27.6) | 0.12. (0.012 - 1282) | 0.090 |
| Monochorial MA | 8 (21.6) | 4 (13.8) | 0.28 (0.026 - 3.119) | 0.310 | |
| Bichorial BA | 15 (40.5) | 16 (55.2) | 0.13 (0.015 - 1.221) | 0.750 | |
| Birth attendant | Mid-wife | 7 (18.9) | 10 (34.5) | 0.85 (1.98 - 3.65) | 0.000 |
| Resident/intern | 23 (62.2) | 12 (41.4) | 2.33 (6.38 - 8.50) | 0.000 | |
| Gynecologist | 6 (16.2) | 7 (24.1) | 1.04 (0.10 - 1.042) | 0.207 | |
| Nurse | 1 (2.7) | 0 (0.0) | - | - | |
| Delivery time of twin 2 | <15 min | 20 (41.7) | 28 (58.3) | 0.88 (0.25 - 3.03) | 0.835 |
| ≥15 min | 17 (58.3) | 1 (5.6) | 2.45 (1.14 - 5.26) | 0.019 |