Table 1 Population characteristics
Characteristic | VBAC (n = 910) | Failed TOL (n = 152) | t/t′ or χ2 value | P value |
|---|---|---|---|---|
IT diameter (cm) | 8.19 ± 2.69 | 7.95 ± 0.34 | 2.574 | 0.010 |
Maternal predelivery BMI (kg/m2) | 25.68 ± 3.21 | 27.45 ± 3.13 | −6.327 | < 0.001 |
Fundal height (cm) | 31.56 ± 3.50 | 33.39 ± 2.52 | −7.805 | < 0.001 |
Maternal AC (cm) | 96.31 ± 9.59 | 99.26 ± 5.87 | −3.673 | < 0.001 |
Gestational age at delivery (weeks) | 36.57 ± 3.57 | 38.42 ± 2.29 | −8.416 | < 0.001 |
Estimated fetal weight (g) | 2752.67 ± 753.56 | 3198.74 ± 517.45 | −7.025 | < 0.001 |
Maternal age at delivery | 6.292 | 0.012 | ||
< 35 years | 759 (83.4) | 114 (75.0) | ||
≥35 years | 151 (16.6) | 38 (25.0) | ||
Interdelivery interval | 3.913 | 0.048 | ||
2–4 years | 450 (49.5) | 62 (40.8) | ||
< 2 or > 4 years | 460 (50.5) | 90 (59.2) | ||
TOL during prior CD | 5.497 | 0.019 | ||
Yes | 159 (17.5) | 15 (9.9) | ||
No | 751 (82.5) | 137 (90.1) | ||
Dystocia as prior CD indication | 30.590 | < 0.001 | ||
Yes | 137 (15.1) | 51 (33.6) | ||
No | 773 (84.9) | 101 (66.4) | ||
Previous vaginal delivery | 10.813 | 0.001 | ||
Yes | 121 (13.3) | 6 (3.9) | ||
No | 789 (86.7) | 146 (96.1) | ||
Hypertensive disorders | 5.894 | 0.015 | ||
Yes | 29 (3.2) | 11 (7.2) | ||
No | 881 (96.8) | 141 (92.8) |