Table 4.

Diagnostic criteria for CXCL-8. Classical tumor markers (CEA and SCC-Ag) and C-reactive protein (CRP) levels in oesophageal cancer (OC) patients

	Diagnostic sensitivity (%)	Diagnostic specificity (%)	PPV (%)	NPV (%)	Accuracy (%)
CXCL-8	86	73	86	73	82
CRP	82	92	95	73	86
CEA	18	100	100	39	46
SCC-Ag	74	96	97	66	82
CXCL-8 + CRP	100	65	85	100	88
CXCL-8 + CEA	86	73	86	73	82
CXCL-8 + SCC	96	73	87	90	88
CRP + CEA	84	92	95	75	87
CRP + SCC	90	88	94	82	89
CEA + SCC	76	96	97	68	83