External Validation of Early Quality of Life (QOL) Declines Correlated with Late QOL after Intensity Modulated, Low Dose Rate Brachytherapy, or Stereotactic Radiation for Prostate Cancer within a Prospective Trial

There is data on early toxicity associated with late toxicity, but there is currently a lack of data on quality of life (QOL) outcomes and evaluation for possible surrogacy between early and late toxicity. This is an evaluation of early QOL for prostate cancer across RT options with a validation within QOL from a SBRT prospective trial. An initial cohort of 898 patients (PROSTQA study and 3 institutions with prospective QOL data were pooled for...