Table 3.

Univariate logistic regression analysis of risk factors associated with the adverse maternal outcome in the after propensity score matching cohort.

	Adverse maternal outcome
Characteristics	OR (95%CI)	p value
Age ≥35 years (vs. <35)	1.50 (0.68–3.29)	0.311
Gestational age <37 weeks (vs. ≥37)	1.86 (0.80–4.32)	0.148
Cesarean section >1 (vs. ≤ 1)	0.93 (0.39–2.22)	0.864
History of dilatation and curettage of uterine (vs. no)	1.63 (0.75–3.56)	0.220
HGB <100 g/L (vs. ≥100)	1.55 (0.68–3.52)	0.294
Placenta previa classification		0.778
Marginal	Reference
Partial	–	–
Complete	0.66 (0.20–2.11)	0.478
Retroplacental myometrial thinning <1 mm (vs. ≥1)	2.31 (0.86–6.18)	0.095
Vascular lacunae within the placenta (vs. no)	2.76 (0.99–7.72)	0.052
Hypervascularity of uterine-placental margin (vs. no)	1.37 (0.55–3.40)	0.495
Irregularity of uterine-bladder interface (vs. no)	2.95 (1.25–6.98)	0.014
Hypervascularity of the uterine serosa-bladder wall interface (vs. no)	3.43 (1.52–7.74)	0.003
Hypervascularity of cervix (vs. no)	9.88 (2.08–46.86)	0.004
Emergency cesarean section (vs. no)	2.03 (0.54–7.65)	0.298
BPAA (vs. no)	0.09 (0.03–0.22)	<0.001
B-Lynch suture (vs. no)	0.60 (0.24–1.46)	0.257
Ligation of ascending branch of uterine artery (vs. no)	0.28 (0.10–0.77)	0.014
Tourniquet binding the lower uterine segment (vs. no)	0.64 (0.20–2.07)	0.458

OR, odds ratio; HGB, hemoglobin; BPAA, balloon placement in the abdominal aorta.