Kaplan-Meier OS analysis proved that an elevated P4HA1 expression predicted worse OS of patients with ACC, BLCA, BRCA, CESC, GBM, HNSC, KICH, KIRP, LUAD, MESO, OV, PAAD, PCPG, SARC, STAD, YHCA, THYM, and UVM (Figure 4). This evidence concerns the gene P4HA1 and glioblastoma.