Table 2.

ROC analysis for the cut-off value of the maximum short axis of the thymic vein for distinguishing thymic carcinoma from other thymic lesions.

		Cut-off maximum short axis of the thymic vein (mm)
		1	1.5	2	2.5	3
versus Thymoma + Thymic cysts
Area under the ROC curve	0.89
Sensitivity (%)		100	100	83	50	8
Specificity (%)		2	37	86	92	100
True-positive (n)		12	12	10	6	1
False-positive (n)		50	32	7	4	0
P value [Fisher exact test]		>.99	.012∗	<.001∗	.002∗	.19
versus Thymoma
Area under the ROC curve	0.89
Sensitivity (%)		100	100	83	50	8
Specificity (%)		0	24	85	94	100
True-positive (n)		12	12	10	6	1
False-positive (n)		34	26	5	2	0
P value [Fisher exact test]		>.99	.090	<.001∗	.002∗	.26

^∗Statistically significant.

ROC = receiver operating characteristic.