High-risk esophageal varices in patients treated with locoregional therapy for hepatocellular carcinoma: Assessment with liver computed tomography

Table 1 Az in receiver operating characteristic curve analysis and P values of liver computed tomography for the detection of high-risk esophageal varices by three observers

	Observer 1	Observer 1	Observer 2	Observer 2	Observer 3	Observer 3	Mean	Mean
	Transverse	3 MPR	Transverse	3 MPR	Transverse	3 MPR	Transverse	3 MPR
ROC Az	0.947 ± 0.031	0.965 ± 0.025	0.969 ± 0.024	0.959 ± 0.027	0.916 ± 0.038	0.938 ± 0.033	0.946 ± 0.018	0.954 ± 0.017
95%CI	0.883-0.982	0.908-0.991	0.913-0.993	0.899-0.988	0.843-0.962	0.871-0.976	0.914-0.968	0.924-0.975
P value1	0.318		0.328		0.271		0.367
P value2	Observer 1-2	Observer 1-2	Observer 2-3	Observer 2-3	Observer 3-1	Observer 3-1
	0.368	0.782	0.099	0.461	0.35	0.334

¹Represent the differences of the A_z values for transverse images alone and for the three orthogonal MPR images by each observer and the pooled data;

²Represent the differences (interobserver comparisons) of the Az values among three observers with both transverse images alone and with the three orthogonal MPR images.Transverse indicates transverse images alone and 3 MPR indicates three orthogonal MPR images. Az values are mean ± SD. CI: Confidence interval; MPR: Multiplanar reformation; ROC: Receiver operating characteristic.