Fig. 3

Immune infiltration in OSCC patients with high and low Risk Scores. a The infiltration ratio of 22 kinds of immune cells in TCGA samples. b Correlation matrix of the ratio of 22 immune infiltrating cells. The red color represents a positive correlation and the blue color represents a negative correlation. c Violin diagram of immune cells with significantly different proportions of infiltration in high and low risk groups. The high and low risk groups are represented by different colors , and the vertical axis is the relative infiltration ratio of different immune cells. *P value < 0.05, **P value < 0.01, ***P value < 0.001, and ****P value < 0.0001. d The correlation between the Risk Score and the expression of six key immune checkpoints. e Differentially expressed immune checkpoints between the high and low risk groups