Success of trial of labor in women with a history of previous cesarean section for failed labor induction or labor dystocia: a retrospective cohort study

Table 1 Characteristics of the study population in trial of labor after cesarean (TOLAC) n = 660

	Successful TOLAC		Unsuccessful TOLAC
	n = 481	%	n = 179	%	p
Maternal age ≥ 37	77	16.0	38	21.2	0.12
IVF	13	2.7	3	1.7	0.45
Smoking	33	6.9	15	8.4	0.5
Height < 160 cm	97	20.2	50	27.9	0.03
BMI ≥ 35	34	7.1	19	10.6	0.01
Diabetes	121¹	25.2	63²	35.2	0.01
Prior vaginal delivery	124	25.8	17	9.5	< 0.001
More than 2 years from previous CS	289	60.1	117	65.4	0.22
Medication-dependent gestational diabetes	25	5.5	14	8.5	0.64
Post-term pregnancy (≥42 weeks)	35	7.3	29	16.2	0.001
Labor induction	143	29.7	83	46.4	< 0.001
Bishop < 6 at the start of induction	95	66.4	58	69.8	0.59
Indication for labor induction
Post-term	37	25.9	28	33.7	0.21
PROM	27	18.9	17	20.5	0.77
Diabetes	28³	19.6	12⁴	14.5	0.33
Non-diabetic macrosomia	3	2.1	4	4.8	0.26
Fetal reason	8	5.6	8	9.6	0.25
Maternal reason	40	28.0	14	16.9	0.06