Enhancement parameters of contrast-enhanced computed tomography for pancreatic ductal adenocarcinoma: Correlation with pathologic grading

Table 2 Diagnostic performance of computed tomography parameters for the prediction of pathological grading

	WD-MD (n = 34) vs PD (n = 8)				WD (n = 13) vs MD-PD (n = 8)
	Az	SD	P value	95%CI	Az	SD	P value	95%CI
TARarterial	0.71	0.101	0.467	0.549 - 0.839	0.509	0.107	0989	0.351 - 0.667
TARpancreatic	0.654	0.112	0.742	0.492 - 0.794	0.512	0.0993	0.196	0.353 - 0.669
TAF	0.757	0.102	0.428	0.601 - 0.876	0.692	0.0829	0.093	0.531 - 0.825

Data are presented as mean ± SD (median). CT: Computed tomography; WD: Well-differentiated; MD: Moderately differentiated; PD: Poorly differentiated group; TAR_arterial and TAR_pancreatic: Tumor-to-aorta enhancement ratio in the arterial and pancreatic phases; TAF: Tumor-to-aortic enhancement fraction.