CYP2E1 and gastric cancer: For CYP2E1 PstI/RsaI polymorphism, C2C2 homozygotes (OR = 2.15; CI: 1.18–3.94) and C2 carriers (OR = 1.48; CI: 1.13–1.96) were associated with an increased risk of gastric cancer when compared with C1C1 homozygotes.