Diagnostic performance of dynamic contrast-enhanced magnetic resonance imaging parameters and serum tumor markers in rectal carcinoma prognosis

Table 5 Delong test of the areas under the curve of DCE-MRI parameters and tumor markers in distinguishing T staging and differentiated degree

Test results	Z value	P value	Difference in AUC	Standard error difference	95%CI
					Lower bound	Upper bound
T stage
CA199-CA125	-1.452	0.146	-0.029	0.293	-0.068	0.01
CA199 - DCE-MRI parameters + tumor markers	7.616	< 0.001	0.609	0.299	0.453	0.766
CA125- DCE-MRI parameters + tumor markers	7.856	< 0.001	0.638	0.296	0.479	0.797
Differentiation degree
CA199-CA125	0.617	0.537	0.038	0.287	-0.082	0.157
CA199- DCE-MRI parameters + tumor markers	14.913	< 0.001	0.780	0.248	0.677	0.882
CA125- DCE-MRI parameters + tumor markers	13.382	< 0.001	0.742	0.257	0.633	0.851

AUC: Area under the curve; DCE-MRI: Dynamic contrast-enhanced magnetic resonance imaging; CA19-9: Carbohydrate antigen 19-9; CA125: Carbohydrate antigen 125.