From the definition it looks like we have to use (overall survival )OS for developing survival models but one of the discussion points out that HR Flag has been decided on the Basis of Progression free survival. SO just want to confirm whether we have to use PFS (Progression Free Survival) or OS for developing model.
Created by sherry bhalla sherry_bhalla Thanks for the clarification Guan
Sorry for that. Realized it after posting, so posted on the correct forum too. pfs, but that is not going to make much difference.
p.s.you posted on the wrong forum