highly significantp < 0.05
In addition, a comparison of patients with high-grade and low-grade gliomas via LASSO ( Table S10 ) and ANOVA ( Table S12 ) identified 2-aminoadipic acid (2-AAD) ( p < 0.05; [HGG/LGG] ratio 15.89) as a highly significant metabolite differentiating the two groups ( p < 0.05; [HGG/LGG] ratio 11.33).