Table 2 Factors influencing vaginal birth after caesarean section among the intrapartum group

Age

t = 0.754

0.451

 n

578

119

 M (SD)

32.07 (4.68)

31.71 (5.00)

BMI

U = 30586.5

0.057

 n

578

119

 Mean rank

342.42

380.97

Gestational Age

U = 28823.5^a

0.005

 n

578

119

 Mean

339.25

395.79

Previous VB

X² = 3.93^a

0.029

 Yes

200 (34.6%)

30 (25.2%)

Previous VBAC

X² = 5.24^a

0.014

 Yes

290 (50.2%)

46 (38.7%)

Induction

X² = 7.40^a

0.007

 Yes

64 (11.1%)

24 (20.2%)

Station

X² = 1.135

0.769

 -3

347 (60.0%)

69 (58.0%)

 -2

110 (19.0%)

27 (22.7%)

 -1 and 0

112 (19.4%)

22 (18.5%)

  + 1 and + 2

9 (1.6%)

1 (0.8%)

Cervical effacement on admission

X² = 18.642^b

0.0001

 0–30%

41 (7.1%)

16 (13.4%)

 40–50%

152 (26.3%)

48 (40.3%)

 60–70%

106 (18.3%)

18 (15.1%)

 80% or more

279 (48.3%)

37 (31.1%)

Cervical dilation on admission

X² = 25.164^b

0.0001

 Closed

2 (0.3%)

1 (0.8%)

 1–2

53 (9.2%)

23 (19.3%)

 3–4

261 (45.2%)

68 (57.1%)

 5 or more

262 (45.4%)

27 (22.7%)

Presence of HTN disorders

X² = 6.76^a

0.034

 No HTN

559 (96.7%)

111 (93.3%)

 Preeclampsia

19 (3.3%)

7 (5.9%)

 Chronic HTN

0 (0.0%)

1 (0.8%)