CYP2E1 and colorectal carcinoma: Subgroup analysis by ethnicity revealed that there were significant associations between CYP2E1 rs2031920 polymorphism and CRC risk in Asians in homozygous (OR = 1.578, 95% CI 1.209–2.058, P = 0.001), recessive (OR = 1.526, 95% CI 1.176–1.980, P = 0.001), and allele models (OR = 1.231, 95% CI 1.031–1.469, P = 0.021), an observation consistent with the overall analysis (Table 3).