Figure 6.

Kaplan-Meier survival curves of the glioblastoma patients grouped according to MGMT methylation status and tumor vascularity based on rCBV: (A) rCBV <1.3 with MGMT methylation (n=5); (B) rCBV <1.3 without MGMT methylation (n=18); (C) rCBV ≥1.3 with MGMT methylation (n=17); (D) rCBV ≥1.3 without MGMT methylation (n=10). There was no association between MGMT methylation status and prognosis in lower and higher rCBV. OS, Overall survival; PFS, progression-free survival; MGMT, O6-methylguanine DNA methyltransferase; rCBV, cerebral blood volume ratio; rCBF, cerebral blood flow ratio.