Table 1.

Demographic and main clinical data of CRC patients and controls used for PD-1 SNP genotyping.

Characteristics			CRC (100)	Control (100)
Gender (number)	Male		64	65
	Female		36	35
Age (average ± SD)			56.33 ± 14.56	56.31 ± 14.56
Localization	Colon		40	-
	Recto-sigmoid		60	-
Stages		I	11	-
		II	57	-
		III	32	-
		IV	0	-