LAUSR

99Background: We previously reported the effects of the PSA screening guidelines on the patterns of diagnosis and treatment for PCa based on analyses from the NCDB dataset (Aragon-Ching et al., ASCO GU 2016). Given increasing use and advocacy for active surveillance, we now report on the treatment utilization patterns for PCa by facility type and overall incidence of active treatment (surgery or radiation), no treatment, or active surveillance by PCa stage using the NCDB dataset. Methods: Using a de-identified dataset acquired from NCDB from 1998 to 2012, treatment status of all 337,568 men for which information was available was tabulated according to whether active treatment, no treatment, or active surveillance (i.e. watchful waiting) was performed. Patient characteristics, stage, and treatment status by facility type was determined. Results: There were 1,802,596 patients diagnosed with prostate cancer between 1998 and 2012 in the NCDB. Of the 337,568 men for which treatment status was available, 92% r...