The application of prophylactic balloon occlusion of the internal iliac artery for the treatment of placenta accreta spectrum with placenta previa: a retrospective case-control study

Table 1 Comparison of general data between the control group and study group

	Control group	Study group	t (X2)	P
N	56	48
Age, years (mean ± SD)	33.46 ± 4.53	32.08 ± 3.94	1.65	0.103
Gestational weeks (mean ± SD)	36.05 ± 1.66	35.57 ± 1.97	1.36	0.177
Number of pregnancies (mean ± SD)	3.23 ± 1.53	2.81 ± 1.30	1.54	0.138
Number of caesarean sections (mean ± SD)	1.18 ± 0.39	1.19 ± 0.45	−0.11	0.913
Invasive placenta [N (%)]	25 (44.64%)	28 (58.33%)	1.938	0.164

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