Fig. 6

Tumor immune microenvironment analysis of the high- and low-risk groups. A Difference between tumor-infiltrating immune cells. The blue box reflects the low-risk group and the red box represents the high-risk group. B Heatmap showing Spearman’s correlations between differential immune cells and eight OS-related NRGs. Blue denotes a negative correlation and red denotes a positive correlation. The correlation coefficient increases with the degree of color. *p < 0.05, **p < 0.01, ***p < 0.001