Novel serum tumor marker, RCAS1, in pancreatic diseases

Table 3 Unresectability and serum RCAS1, CEA and CA19-9

Unresectability	RCAS1 (%)		CEA (%)		CA19-9 (%)		RCAS1+CEA (%)		RCAS1+CA19-9 (%)		CA19-9+CEA (%)
	Pos	Neg	Pos	Neg	Pos	Neg	Pos	Neg	Pos	Neg	Pos	Neg
Yes	11	6	6	11	12	5	12	5	16	1	14	3
No	1	4	0	5	4	1	1	4	5	0	4	1
Sensitivity	65		35123		712		713		94b		821
Specificity	80		1004		20		80		0		20
Positive predictive value	92		100		75		92		76		78
Negative predictive value	40		31		17		44		0		25
Efficiency	68		50		59		73		73		68

¹P = 0.005 vs CA19-9+CEA;

^bP<0.001 vs RCAS1+CA19-9;

²P = 0.039 vs CA19-9;

³P = 0.039 vs RCAS1+CEA; ⁴P = 0.011 vs RCAS1+CA19-9.