[Retracted] Application of Color Doppler Ultrasound Combined with Magnetic Resonance Imaging in Placenta Accreta

Table 2

Analysis of the value of MRI in the diagnosis of placenta accreta.

MRI diagnosis	Gold standard		Coincidence rate (%)	Kappa value
	Positive	Negative
Positive	36	7	68.91	0.376
Negative	21	25