Univariate regression analysis was performed for PFS, OS, post-recurrence PFS, and post-recurrence OS with respect to a number of our study demographic and clinical variables, including age, gender, GBM location, single vs. multifocal lesion, IDH and MGMT statuses, tumor volumes at various timepoints, administered medications, number of surgical resections, and KPS (Table 3). This evidence concerns the gene MGMT and neoplasm.