Novel serum tumor marker, RCAS1, in pancreatic diseases

Table 1 Diagnosis of malignant and benign diseases by serum RCAS1, CEA and CA19-9

	RCAS1 (%)		CEA (%)		CA19-9 (%)		RCAS1+CEA (%)		RCAS1+CA19-9 (%)		CA19-9+CEA (%)
	Pos	Neg	Pos	Neg	Pos	Neg	Pos	Neg	Pos	Neg	Pos	Neg
Malignant	12	10	6	16	16	6	13	9	21	1	18	4
Benign	3	33	2	34	8	28	5	31	11	25	9	27
Sensitivity	553		27b2		731		592		95b3		82d
Specificity	92		94		78		86		69		75
Positive predictive value	80		75		67		72		66		67
Negative predictive value	78		68		82		78		96		87
Efficiency	78		69		76		76		79		78

^bP<0.001 vs RCAS1+CA19-9;

^dP<0.001 vs CA19-9+CEA; ¹P = 0.003 vs CA19-9;

²P = 0.033 vs RCAS1+CEA;

³P = 0.002 vs RCAS1+CA19-9.