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Kaplan-Meier (A) OS and (B) PFS curves of the patients with glioblastoma grouped according to MGMT methylation status. The patients with MGMT methylation (n=22) had longer PFS compared with those without MGMT methylation (n=28) (P<0.05), but there was no significant difference between patients with and without MGMT methylation in OS. OS, Overall survival; PFS, progression-free survival; MGMT, O6-methylguanine DNA methyltransferase.
