Bady 2012 (E‐GBM).

Study characteristics
Study design	Cohort
Study setting	Setting: Neurosurgery Departments of Rennes and Angers University Hospitals Country: France Dates: NR
Selection of participants	Cases from an external dataset (Etcheverry 2010). Prospectively collected samples from people with newly diagnosed GBM
Participant characteristics	Sample size: 50 (deaths: NR) Age: median 57.5, SD NR; range 26–80 years Sex: 51% men KPS: median 78.6; range 40–100
Tumour characteristics	GBM: 100% First diagnosis: 100% Biopsy: NR; subtotal resection: NR; total resection: NR IDH1 wild‐type: NR; IDH2 wild‐type: NR
Treatment regimen	Stupp protocol
MGMT promoter methylation tests implemented	PSQ, bead array
Dates and follow‐up	Timing of MGMT assessment: at diagnosis Start time for follow‐up: NR; follow‐up: median NR; range NR
Notes