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.

CharacteristicsSuccessful TOLACFailed TOLACP-value

Quantitative dataMean ± SDMean ± SDStudent T test

Maternal age (yr)31.4 ± 5.632.1 ± 5.40.101

Interval from last previous cesarean2.9 ± 1.13.0 ± 1.10.647

No. of antenatal visits7.4 ± 3.58.0 ± 3.50.085

BMI (kg/m2)23.3 ± 4.024.6 ± 4.7< 0.001

Gestational age (wk)36.2 ± 3.337.3 ± 2.0< 0.001

Birth weight (g)2714 ± 5233062 ± 664< 0.001

Apgar score at 1 min8.4 ± 2.08.5 ± 1.60.370

Apgar score at 5 min9.4 ± 1.19.5 ± 9.60.164

Categorical datan/N (%)n/N (%)Chi-squareRelative risk (95% CI)

Parity (1 vs ≥2)285/486 (58.6%)70/106 (66.0%)0.1590.89 (0.76-1.04)

Induction of labor17/47 (36.2%)338/545 (62.0%)0.0010.58 (0.19-0.65)

Recurrent indications84/166 (50.6%)271/426 (63.6%)0.0040.79 (0.67-0.94)

Prior vaginal delivery90/116 (77.6%)265/476 (55.7%)<0.0011.39 (1.23-1.58)

Audit system135/165 (81.8%)220/427 (51.5%)<0.0011.59 (1.41-1.79)