Figure 2 The correlations between glutathione peroxidase 1 (GPX1) expression, clinical characteristics, and overall survival (OS) based on The Cancer Genome Atlas (TCGA) and Chinese Glioma Genome Atlas (CGGA) datasets. GPX1 expression was higher in glioblastoma than in lower-grade glioma based on the TCGA (A) and CGGA (B) dataset. High expression of GPX1 correlated with poor OS based on the TCGA (C) and CGGA (D) datasets. The associations between GPX1 expression and clinical characteristics: age (E), sex (F), 1p/19q codel status (G), isocitrate dehydrogenase (IDH) status (H), and grade (I) in the TCGA dataset; age (J), sex (K), 1p/19q codel status (L), IDH status (M), and grade (N) in the CGGA dataset. Univariate and multiple Cox regression analysis of clinicopathological features (including GPX1 expression) and OS in the TCGA (O) and CGGA (P) datasets.