Study of serum tumor markers in the early diagnosis of pancreatic cancer

Table 4 Pearson correlation analysis between pancreatic cancer and serum tumor markers (carbohydrate antigen 19-9, carcinoembryonic antigen), serum soluble intercellular adhesion molecule-1, and chitinase-3-like protein 1 Levels

Parameter	Pancreatic cancer		Stage I pancreatic cancer		Stage II pancreatic cancer
	r	P value	r	P value	r	P value
CA-19-9	0.639	< 0.001	0.641	< 0.001	0.678	< 0.001
CEA	0.625	< 0.001	0.632	< 0.001	0.662	< 0.001
sICAM-1	0.529	< 0.001	0.552	< 0.001	0.583	< 0.001
CHI3 L1	0.517	< 0.001	0.534	< 0.001	0.571	< 0.001

CA-19-9: Carbohydrate antigen 19-9; CEA: Carcinoembryonic antigen; sICAM-1: Soluble intercellular adhesion molecule-1; CHI3 L1: Chitinase-3-like protein 1.