Low SMAD5 mRNA expression level was significantly correlated with better OS in all gastric cancer patients (HR = 1.29 (1.09–1.52) P = 0.0032, Figure 5(a)) and better OS in diffuse gastric cancer patients (HR = 1.47 (1.02–2.12) P = 0.036 (Figure 5(c)). The gene discussed is SMAD5; the disease is gastric cancer.