Clinical Utility of the Prenatal Ultrasound Score of the Placenta Combined with Magnetic Resonance Imaging in Diagnosis of Placenta Accreta during the Second and Third Trimester of Pregnancy

Table 7

Area under the curve.

Test result variable	Area	Standard error a	Asymptotic Sig b	Asymptotic 95% confidence interval
Ultrasound score	0.773	0.054	0.000	0.668–0.879
MRI	0.824	0.050	0.000	0.726–0.921
Combined diagnosis	0.913	0.036	0.000	0.841–0.984

Note. a. under nonparametric assumptions; b. null hypothesis: real area = 0.5; Sig b indicated significance.