We plotted the correlation between the risk model genes and the risk scores (Figure 6(a)); APOD, SFRP2, and RAMP1 were significantly positively correlated with risk scores, with APOD having the strongest correlation with risk scores and significantly affecting the prognosis of gastric cancer patients (Figure 6(b)), with patient information from the GEPIA website (http://gepia.cancer-pku.cn/index.html). The gene discussed is SFRP2; the disease is gastric cancer.