Prostate Specific Antigen Testing As Disease Surveillance And Monitoring Five Years After Definitive Therapy For Localized Prostate Cancer.

e17602 Background: The National Comprehensive Cancer Network, in 2007, recommends prostate specific antigen (PSA) testing every 6-12 months for the first 5 years following definitive treatment for localized prostate cancer. We compared guideline-concordant PSA testing, as disease surveillance and monitoring, in African-American (AA) and Caucasian (CA) men 5-years after definitive therapy. Methods: A total of 19,377 CA and 1,995 AA men from the Surveillance, Epidemiology, and End Results (SEER)-Medicare linked database diagnosed with prostate cancer and received definitive treatments from 2007 through 2016 were included. Multivariate log-binomial regression model were used to examine the effect of demographic and clinical characteristics on the likelihood of not receiving at least one PSA surveillance test annually for the first 5 years following definitive treatment. Results: Overall, receipt of surveillance testing and monitoring was high, with 97% of CA men and 94% of AA men receiving at least one test the first year after treatment and approximately 81% of CA men and 77% of AA men receiving at least one test in the fifth year after treatment. Risk of not receiving a test in AA men declined with time compared to CA men, in the first year (Relative Risk [RR], 1.68, 95% CI, 1.37-2.07) and the fifth year (RR, 1.07, 95% CI, 0.98-1.18) since treatment. Further, non-married men and men with intermediate risk had a higher risk of not receiving a surveillance test. Conclusions: Most men received guideline-concordant PSA testing 5-years after definitive therapy. The decline in PSA surveillance overtime reflects the need for continued long-term survivorship care planning and coordination. [Table: see text]