BIRC5 and gastric cancer: Furthermore, we also found significant connections between the CC genotype of survivin −31G>C polymorphism and increased risk of gastric cancer under the recessive and heterozygous genetic models (OR = 1.75, 95%CI: 1.07–2.86, P = 0.026; OR = 1.59, 95%CI: 1.14–2.22, P = 0.006; respectively) (Figure 3).