Table 4 Comparison of AUCs in the recognition of ten fetal neurosonographic image patterns between three assisted modes.

AUC of ten patterns recognition	Unassisted mode	Concurrent mode	Second mode	Second mode (1)	P values of multiple comparisons
AUC of ten patterns recognition	Unassisted mode	Concurrent mode	Second mode	Second mode (1)	Concurrent vs. Unassisted	Second vs. Unassisted	Concurrent vs. Second	Second (1) vs. Unassisted
Nonvisualization of CSP	0.68 (0.67, 0.69)	0.77 (0.76, 0.78)	0.78 (0.77, 0.80)	0.69 (0.68, 0.71)	< 0.001	< 0.001	0.175	0.229
Nonvisualization of SP	0.84 (0.82, 0.85)	0.90 (0.88, 0.91)	0.92 (0.90, 0.93)	0.87 (0.85, 0.88)	< 0.001	< 0.001	0.066	0.015
Crescent-shaped single ventricle	0.91 (0.89, 0.92)	0.95 (0.94, 0.96)	0.95 (0.94, 0.96)	0.90 (0.88, 0.91)	< 0.001	< 0.001	0.669	0.304
Mild VM	0.81 (0.80, 0.83)	0.86 (0.85, 0.88)	0.87 (0.86, 0.88)	0.80 (0.78, 0.82)	< 0.001	< 0.001	0.379	0.360
Severe VM	0.85 (0.83, 0.86)	0.89 (0.88, 0.91)	0.90 (0.89, 0.91)	0.85 (0.83, 0.86)	< 0.001	< 0.001	0.599	0.749
Nonintraventricular cyst	0.80 (0.78, 0.82)	0.84 (0.81, 0.86)	0.84 (0.82, 0.86)	0.79 (0.77, 0.81)	0.005	0.005	0.988	0.622
Intraventricular cyst	0.91 (0.89, 0.92)	0.93 (0.92, 0.94)	0.94 (0.93, 0.96)	0.90 (0.88, 0.91)	0.008	< 0.001	0.257	0.383
Open fourth ventricle	0.93 (0.92, 0.95)	0.95 (0.94, 0.96)	0.96 (0.95, 0.97)	0.94 (0.93, 0.95)	0.030	0.004	0.507	0.483
Megacisterna magna	0.91 (0.89, 0.92)	0.91 (0.90, 0.92)	0.94 (0.93, 0.95)	0.90 (0.89, 0.91)	0.770	< 0.001	0.001	0.661
Normal	0.92 (0.91, 0.93)	0.94 (0.94, 0.95)	0.95 (0.94, 0.96)	0.92 (0.92, 0.93)	< 0.001	< 0.001	0.371	0.301

CSP Cavum septi pellucidi, SP Septum pellucidum, VM Ventriculomegaly; second mode (1), the results before AI assistance in second reading mode. AUCs between each two groups were compared by Delong’s test. Multiple comparisons were corrected by Bonferroni method.

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