Characterization of Observational Phase IV Studies Submitted to Clinicaltrials.Gov Between 2007 and 2017

Abstract

S113using HIPAA-compliant methods was successful, giving a sub-sample of linked patients for which both patient-reported data and clinical data can be used to address research questions. Prevalence estimates for linked, non-linked, and the full PaCeR samples were as expected, with the highest prevalence being among those seeking care (linked), and the lowest among those who may or may not be seeking care (non-linked).