According to the ROC curves (Figures 8B–F), the expression level of key genes including CTSD, CREG1, PECAM1, ZNF101, RRM2B, MARCKSL1, and MAP2K4 demonstrated a certain accuracy in classifying epilepsy and control groups (0.7 < AUC < 0.9). This evidence concerns the gene CREG1 and epilepsy.