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Hazard ratios (HRs) for overall survival (OS) in patient subgroups defined by treatment, clinical characteristics, and MGMT promoter methylation status. Univariate Cox regression analyses were performed to identify factors predicting OS. The plots show HRs for death in patient subgroups according to different parameters. MGMT, O6-methylguanine DNA-methyltransferase; RT, radiotherapy: RT/TMZ, radiotherapy with concomitant temozolomide; TMZ, temozolomide.
