Table 1.
Maternal characteristics and pregnancy information for twin pregnancies according to mode of delivery.
| All | Vaginal delivery (VD) | Elective cesarean section (ELC) | Emergency cesarean section (EMC) | p* | |
| n | 817 | 131 | 251 | 435 | |
| Maternal age, years | 28.5±6.4 | 28.4±6.9 | 29.3±6.4 | 28.0±6.3 | 0.03 ELC>EMC |
| White (%) | 426 (52.1) | 75 (57.3) | 115 (45.8) | 236 (54.3) | 0.05 |
| Nulliparous (%) | 314 (38.4) | 46 (35.1) | 96 (38.2) | 172 (39.5) | 0.66 |
| Previous cesarean (%) | 215 (26.3) | 7 (5.3) | 84 (33.5) | 124 (28.5) | <0.001 VD<ELC; VD<EMC |
| Dichorionic pregnancy (%) | 549 (67.2) | 81 (61.8) | 173 (68.9) | 295 (67.8) | 0.35 |
| Maternal disease (%) | 232 (28.4) | 33 (25.2) | 77 (30.7) | 122 (28.0) | 0.51 |
| High-risk pregnancy (%)a | 143 (17.5) | 13 (9.9) | 47 (18.7) | 83 (19.1) | 0.05 |
| Time to hospital discharge, days | 3.1±2.5 | 2.7±1.6 | 2.9±1.7 | 3.4±3.1 | <0.001 EMC>VD; EMC>ELC |
| Hospital readmission (%) | 11 (1.3) | 1 (0.8) | 1 (0.4) | 9 (2.1) | 0.15 |
| Gestational age at delivery, weeks | 35.6±2.8 | 35.1±3.3 | 36.7±2.3 | 35.1±2.8 | <0.001 ELC>VD; ELC>EMC |
| Birth weight, grams | 2214±593 | 2154±571 | 2359±567 | 2148±600 | <0.001 ELC>VD; ELC>EMC |
| Twin 1 | 2239±579 | 2172±563 | 2397±549 | 2168±585 | |
| Twin 2 | 2188±605 | 2136±580 | 2320±583 | 2127±614 |
The results are presented as the mean ± standard deviation or as absolute and relative frequencies. *: Kruskal-Wallis or chi-square test; a: pregnancies complicated by maternal anemia requiring blood transfusion, thrombocytopenia, cardiomyopathy, pulmonary edema, liver disease, pancreatitis, renal failure, thromboembolic disease, severe preeclampsia, placenta previa, placental abruption, chorioamnionitis, or sepsis.