Analysis of 12 variants in the development of gastric and colorectal cancers

Table 2 Demographic data for patient and control groups

Variable	GC	CRC	Control	P-value
				GC vs Control	CRC vs Control
n	120	64	475	-	-
Age, yr1	57.02 ± 1.29	52.84 ± 1.90	55.59 ± 0.91	0.522	0.294
Sex, % of male/female	55.0/45.0	45.3/54.70	34.7/65.3	0.0003	0.098
European ancestry2	0.42 ± 0.01	0.53 ± 0.02	0.47 ± 0.01	0.0023	0.0033
African ancestry2	0.26 ± 0.01	0.20 ± 0.01	0.23 ± 0.01	0.071	0.0163
Amerindian ancestry2	0.32 ± 0.01	0.27 ± 0.02	0.30 ± 0.01	0.114	0.100

¹Values are expressed as mean ± SD. Significance was obtained by Student’s t-test;

²Values are expressed as mean ± SD. Significance was obtained by Mann-Whitney test;

³Statistically significant. CRC: Colorectal cancer; GC: Gastric cancer.