The development of prediction models that included variables such as pretreatment sexual function, patient characteristics and treatment factors appear to be effective at predicting erectile function 2 years after prostatectomy, external radiotherapy, or brachytherapy for prostate cancer, according to a study in the September 21 issue of JAMA. “Because most patients survive early-stage prostate cancer after treatment, health-related quality of life (HRQOL) outcomes have emerged as a major emphasis in treatment decisions.