**Figure 6.** **Relationships between the risk score and immune cell infiltration levels, and PD-L1 expression levels based on TCGA datasets.** (**A**, **B**) Comparison of immune and estimate scores according to two subtypes grouped by the median risk score. (**C**, **D**) Relationship between the risk score and immune scores and the estimate score. (**E**) The violin plot showed distribution of the ratio differentiation of 22 kinds of immune cells in glioma samples according to two subtypes grouped by the median risk score. (**F**–**J**) Distribution of PD-L1 expression levels based on the risk score (**F**) and expression levels of the four selected AGs (LEP (**G**), TERT (**H**), PON1 (**I**), and SSTR3 (**J**)) of patients with glioma in the TCGA datasets. Non-significant (ns) *P* > 0.05, * *P* < 0.05, ** *P* < 0.01, and *** *P* < 0.001.