**Figure 8.** **Analysis of immune cell content and immune checkpoint.** (**A**) A box plot showed that differences in immune checkpoint gene expression between high- and low-risk groups. (**B**) Correlation between model genes and immune checkpoint. (**C**) The low-risk group has significantly greater IPS, IPS-CTLA4-neg-PD-1-neg, IPS-CTLA4-pos-PD-1-neg, IPS-CTLA4-neg-PD-1-pos, and IPS-CTLA4-pos-PD-1-pos. (**D**) The violin plot demonstrated the difference in Stromal Score, Immune Score, ESTIMATE Score, and tumor purity calculated using the ESTIMATE algorithm between the two risk subgroups. (**E**) The correlations in Stromal Score, Immune Score, ESTIMATE Score, and tumor purity were calculated using the ESTIMATE algorithm between the two risk subgroups. Note: **P* < 0.05, ***P* < 0.01, ****P* < 0.001.