PS2-43: Sensible Use of ICD-9 Diagnosis of Observational Data in Breast and Endometrial Cancer Research

Background/Aims Utilization of administrative data (such as EHR data) in population-based research is resource advantageous, despite its potential limitations. Few studies have fully assessed the validity and efficiency of EHR-retrieved data. We developed ICD-9 based algorithms and operational processes to evaluate applicability of EHR-derived cancer data.