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

Table 2

Correlation analysis between the number of previous abortions and the degree of placenta implantation.

Category	PI(72)	PP(60)
	N	N	OR value	95% CI
0 time	31	3	—	—
1 time	26	14	5.564	1.440–21.495
2 times	12	18	2.786	1.048–7.405
≥3 times	3	25	5.556	1.366–22.591