We noticed significant association with NOD1 rs2075820 (OR = 4.90, 95% CI 1.80–13.36, P = 1.9 × 10− 3) (Additional file 2), in particular in intestinal-type gastric cancer cases (OR = 7.16, 95% CI 2.40–21.33, P = 4.1 × 10− 4) but no among diffuse-type gastric cancer cases (OR = 3.39, 95% CI 1.13–10.10, P = 0.03). This evidence concerns the gene NOD1 and gastric cancer.