Table 1 Demographic and clinical characteristics of the patients in the TOLAC success and failure groups

Maternal age (years),

31.21(17–40)

31.86(18–41)

0.769

BMI (kg/m2)

25.40 ± 3.51

25.63 ± 4.61

0.745

Gravidity, (times),

2 (0–9)

3 (0–9)

0.065

Parity, (times),

1 (0–3)

1 (0–3)

0.056

Number of abortions, (times),

1 (0–9)

2 (0–5)

0.643

History of vaginal delivery (no), n (%)

489 (80.69%)

105 (92.10%)

0.093

Gestational weeks at pregnancy termination, (weeks)

39^0/7(37^0/7–40^0/7)

39^5/7(38^6/7–40^1/7)

 < 0.001

37^0/7–38^6/7

127(20.96%)

48(42.11%)

 ≥ 39^0/7

479(78.22%)

66(57.89%)

Induction of labor (yes), n (%)

176 (29.04%)

75 (65.79%)

 < 0.001

Estimated birth weight (kg)

3.28 (2.84–3.50)

3.35 (3.14–3.66)

0.046

Time from previous CD (years)

6.01 (4.12–8.13)

6.33 (4.39–7.23)

0.642

Indication for the previous CD (failed trial of labor), n (%)

101 (16.80%)

24 (21.12%)

0.534

LUS thickness, mm

22 ± 11

17 ± 10

 < 0.001