Increasing Utilization of Multi-Parametric Magnetic Resonance Imaging in Prostate Cancer Active Surveillance.

INTRODUCTION AND OBJECTIVES:Multi-parametric resonance imaging (mpMRI) has emerged as a tool that may improve risk-stratification and decrease repeated biopsies in men on active surveillance. However, the extent to which mpMRI has been implemented in active surveillance has not been established. Therefore, we sought to characterize the use of multiparametric magnetic resonance imaging (mpMRI) in Medicare beneficiaries electing active surveillance for prostate cancer.METHODS:Using SEER-Medicare claims data, we identified men with localized prostate cancer diagnosed between 2008-2013 and managed with active surveillance. We classified men into two treatment groups: active surveillance without mpMRI and active surveillance with mpMRI. We then fit multivariable logistic regression models to examine changing mpMRI utilization over time and assess factors associated with the receipt of mpMRI.RESULTS:We identified 9,467 men on active surveillance. Of these, 8,178 (86%) did not receive an mpMRI and 1,289 (14%) re...