Research Article
Factors Associated with Successful Trial of Labor after Cesarean Section: A Retrospective Cohort Study
Table 1
Demographic and obstetric characteristics of the women with successful TOLAC and failed TOLAC.
| Characteristics | Successful TOLAC | Failed TOLAC | P-value | |
| Quantitative data | Mean ± SD | Mean ± SD | Student T test | |
| Maternal age (yr) | 31.4 ± 5.6 | 32.1 ± 5.4 | 0.101 | |
| Interval from last previous cesarean | 2.9 ± 1.1 | 3.0 ± 1.1 | 0.647 | |
| No. of antenatal visits | 7.4 ± 3.5 | 8.0 ± 3.5 | 0.085 | |
| BMI (kg/m2) | 23.3 ± 4.0 | 24.6 ± 4.7 | < 0.001 | |
| Gestational age (wk) | 36.2 ± 3.3 | 37.3 ± 2.0 | < 0.001 | |
| Birth weight (g) | 2714 ± 523 | 3062 ± 664 | < 0.001 | |
| Apgar score at 1 min | 8.4 ± 2.0 | 8.5 ± 1.6 | 0.370 | |
| Apgar score at 5 min | 9.4 ± 1.1 | 9.5 ± 9.6 | 0.164 | |
| Categorical data | n/N (%) | n/N (%) | Chi-square | Relative risk (95% CI) |
| Parity (1 vs ≥2) | 285/486 (58.6%) | 70/106 (66.0%) | 0.159 | 0.89 (0.76-1.04) |
| Induction of labor | 17/47 (36.2%) | 338/545 (62.0%) | 0.001 | 0.58 (0.19-0.65) |
| Recurrent indications | 84/166 (50.6%) | 271/426 (63.6%) | 0.004 | 0.79 (0.67-0.94) |
| Prior vaginal delivery | 90/116 (77.6%) | 265/476 (55.7%) | <0.001 | 1.39 (1.23-1.58) |
| Audit system | 135/165 (81.8%) | 220/427 (51.5%) | <0.001 | 1.59 (1.41-1.79) |
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