USMRI Features and Clinical Data-Based Model for Predicting the Degree of Placenta Accreta Spectrum Disorders and Developing Prediction Models

Table 1

Comparison of risk factors between the PI group and PP group.

Group	N	Age (years)		Pregnancy times	History of abortion		History of cesarean section		History of placenta previa		History of placenta accreta spectrum disorders		Uterine fibroid		Hysteroscopy		Adnexal cyst		History of endometrial injury
		<32	≥32		YES	NO	YES	NO	YES	NO	YES	NO	YES	NO	YES	NO	YES	NO	YES	NO
PI	72	50	22	2 (0–3)	41	31	52	20	56	16	19	53	31	41	22	50	60	12	26	46
PP	60	11	49	3 (1–4)	57	3	57	3	54	6	16	44	27	33	19	41	52	8	51	9
X^2/F	34.39			2.13	24.78		10.27		3.52		0.0013		0.05		0.0188		0.2828		32.18
P value