**Figure 4.** **Design and verification of RiskScore model.** (**A**) ROC curves for 1, 3 and 5 years of RiskScore model in TCGA-HCC; (**B**) KM curve of different RiskScore groups in TCGA-HCC; (**C**) Survival state between different RiskScore groups of TCGA-HCC; (**D**) Expression of key genes in TCGA-HCC; (**E**) ROC curves for 1, 3 and 5 years of RiskScore model in GSE14520 dataset; (**F**) KM curve of different RiskScore groups in GSE14520 dataset; (**G**) Survival state between different RiskScore groups of GSE14520 dataset; (**H**) Expression of key genes in GSE14520 dataset. ^{*}*p* < 0.05.