Table 2.

Diagnostic performance of |Z|-score in UCAD test by incorporating all chromosomes, CA 19-9 and CEA for diagnosing biliary tract cancer.

	Cutoff	Specificity	Sensitivity	Accuracy	TN	TP	FN	FP	NPV	PPV
|Z|-score in UCAD test	2	55.6%	93.1%	78.7%	10	27	2	8	84.6%	77.1%
	2.32	88.9%	89.7%	89.4%	16	26	3	2	84.2%	93.1%
	3	100.0%	62.1%	76.6%	18	18	11	0	62.1%	100.0%
CA 19-9	37 U/ml	72.2%	58.6%	63.8%	13	17	12	5	52.0%	77.8%
CA 19-9	90 U/ml	83.3%	34.5%	53.2%	15	10	19	3	44.1%	77.8%
CEA	5 ng/ml	94.4%	20.7%	48.9%	17	6	23	1	42.5%	87.5%

TN, true negative; TP, true positive; FN, false negative; FP, false positive; NPV, negative predictive value; PPV, positive predictive value.