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

Table 3

Value analysis of the combined diagnosis of placenta accreta by the two methods.

Joint diagnosis	Gold standard		Coincidence rate (%)	Kappa value
	Positive	Negative
Positive	44	4	80.90	0.609
Negative	13	28