MUC1 rs4072037 polymorphism is associated with significant decreased gastric cancer risk in four genetic models: G vs. A (OR = 0.507, 95% CI: 0.322–0.799, p = 0.003); heterozygous AG compared with AA (OR = 4.296, 95% CI: 1.190–15.517, p = 0.026); dominant model AG + AA vs. GG (OR = 3.726, 95% CI: 2.033–6.830, p = 0.0001); and over-dominant model AA+GG vs. G (OR = 0.223, 95% CI: 0.120–0.413, p = 0.0001) (Table 4). The gene discussed is MUC1; the disease is gastric cancer.