Table 2

Univariate logistic analysis of factors predicting successful TOLAC in the training set of women

CharacteristicsFailure of TOLAC (N=142)Success of TOLAC (N=1349)OR (95% CI)
Age (years)<35125 (9.5)1186 (90.5)1.0
≥ 3517 (9.4)163 (90.6)1.01 (0.59 to 1.72)
Education (years)<973 (8.6)775 (91.4)1.0
≥969 (10.7)574 (89.3)0.78 (0.55 to 1.11)
Gestational age (weeks)≥4130 (14.4)179 (86.6)1.0
<41112 (8.7)1170 (91.3)1.75 (1.14 to 2.70)
ParityOne previous delivery130 (10.3)1134 (89.7)1.0
≥2 previous deliveries12 (5.3)215 (94.7)2.05 (1.12 to 3.78)
Number of abortions<3133 (9.5)1272 (90.5)1.0
≥39 (10.5)77 (89.5)0.90 (0.44 to 1.83)
History of vaginal deliveryNo130 (10.3)1136 (89.7)1.0
Yes12 (5.3)213 (94.7)2.03 (1.11 to 3.74)
Time from previous delivery (years)≤24 (6.6)57 (93.4)1.0
>2138 (9.6)1292 (90.4)0.66 (0.24 to 1.84)
BMI (kg/m2)≥3025 (16.7)125 (83.3)1.0
<30117 (8.7)1224 (91.3)2.09 (1.31 to 3.35)
Diabetes or pregestational diabetesYes12 (9.5)114 (90.5)1.0
No130 (9.5)1235 (90.5)1.00 (0.54 to 1.86)
HypertensionYes2 (8.7)21 (91.3)1.0
No140 (9.5)1328 (90.5)0.90 (0.21 to 3.89)
Estimated birth weight (kg)≥417 (37.0)29 (63.0)1.0
<4125 (8.6)1320 (91.4)6.19 (3.31 to 11.58)
Previous caesarean indicationsRecurrent1 (33.3)2 (66.7)1.0
Non-recurrent141 (9.5)1347 (90.5)4.78 (0.43 to 53.02)
Onset of labourInduced65 (22.3)226 (77.7)1.0
Spontaneous77 (6.4)1123 (93.6)4.20 (2.93 to 6.01)
Oxytocin augmentationYes68 (23.1)226 (76.9)1.0
No74 (6.2)1123 (93.8)4.57 (3.19 to 6.54)
AnalgesicYes0 (0.0)4 (100.0)1.0
No142 (9.6)1345 (90.5)<0.01 (<0.01 to >99.9)
Cervix Bishop score<5105 (15.9)555 (84.1)1.0
≥537 (4.5)794 (95.5)4.06 (2.75 to 6.00)
Rupture of membranesYes44 (14.8)253 (85.2)1.0
No98 (8.2)1096 (91.8)1.95 (1.33 to 2.85)
  • BMI, body mass index; TOLAC, trial of labour after caesarean delivery.