Low expression of SMAD7 was a favorable predictor of OS in all gastric cancer patients (HR = 1.27 (1.06–1.52), P = 0.0081, Figure 7(a)), gastrointestinal cancer patients (HR = 1.82 (1.2–2.77), P = 0.0041, Figure 7(b)), and diffuse gastric cancer patients (HR = 1.49 (1.05–2.13), P = 0.026, Figure 7(c)). The gene discussed is SMAD7; the disease is gastric cancer.