Compared with the low-risk allele, the high-risk allele of SNP rs4072037 in MUC1, with a frequency of 89% in the group of all gastric cancer cases under 50 years of age, had a per-allele risk of 1.76 (95% CI 1.01-3.05, P = 0.045*) adjusted for sex and age in an unconditional logistical model (Table 2). This evidence concerns the gene MUC1 and gastric cancer.