Yang 2012.

Study characteristics
Study design	Cohort
Study setting	Setting: Catholic University of Korea, Suwon Country: South Korea Dates: surgery between 2000 and 2006
Selection of participants	People undergoing surgery with new histological diagnosis of supratentorial GBMs classified according to the WHO 2007 criteria
Participant characteristics	Sample size: 18 (deaths: 13) Age: mean 53.3, SD 14.1; range 23–71 years Sex: 50% men KPS: NR
Tumour characteristics	GBM: 100% First diagnosis: NR Biopsy: 5.6%; subtotal resection: 27.8%; total resection: 66.7% IDH1 wild‐type: NR; IDH2 wild‐type: NR
Treatment regimen	Radiotherapy + TMZ (66.7%); radiotherapy + PCV + TMZ (33.3%)
MGMT promoter methylation tests implemented	MSP, IHC
Dates and follow‐up	Timing of MGMT assessment: tumour samples obtained during surgery Start time for follow‐up: date of histological diagnosis; follow‐up: median NR; range NR
Notes