While trying to anaylze survival of glioblastoma patients, I came up with the following data from downloaded GBM_clinicalMatrix file:
sampleID CDE_survival_time CDE_vital_status days_to_last_followup TCGA.06.5859.01 138 LIVING 139 TCGA.27.1831.01 504 DECEASED 505
I wondered if in my survival analysis I should use139 instead of 138 and 504 instead of 505. I have no idea how it is possible that when a person is deceased the followup is one day after death and when a person is alive last followup doesn't "update" survival time? Am I wrong or has there been a mistake (or two) in downloaded data??
Thank you in advance