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Implementing Primary Care Mediated Population Genetic Screening Within an Integrated Health System

Sean P. David, MD, SM, DPhil; Henry M Dunnenberger, PharmD; Raabiah Ali, MPH; Adam Matsil, MS; Amy A Lemke, PhD, MS; Lavisha Singh, MPH; Anjali Zimmer, PhD; Peter J Hulick, MD, MMSc

Corresponding Author:  Sean P. David, MD, SM, DPhil; University of Chicago. Email:  SDavid@northshore.org 

Section: Research Letter

Publication: TBD

Introduction: Genetic screenings can have a large impact on enabling personalized preventive care. However, this can be limited by the primary use of medical history-based screenings in determining care. The purpose of this study was to understand the impact of DNA10K, a population-based genetic screening program mediated by primary care physicians within an integrated health system to emphasize its contribution to preventive healthcare. Methods: Construction of the patient experience as part of DNA10K shaped the context for PCP engagement within the program. A cross-sectional analysis of patient consents, orders, tests, and results of nearly 10,000 patients within the primary care specialties of family medicine, internal medicine or obstetrics/gynecology between April 1, 2019 and January 22, 2020 was conducted. Results: Across all specialties, a median number of 7.5 cancer and cardiovascular disease variants per PCP was found. The average age of the study population was 49.6 years. Over 8% of these patients had at least one actionable genetic risk variant and almost 2% of patients had at least one CDC Tier 1 variant. The median numbers of patients per PCP with either hereditary breast and ovarian cancer, Lynch Syndrome, or Familial Hypercholesterolemia was 1 (Interquartile Range 0-2). Discussion: The analysis of test results and the engagement of an integrated healthcare system in the implementation of a genetic screening program suggests that it can have a large impact on population health outcomes and minimal referral burden to PCPs if identified risks can lead to preventive care. 

ABSTRACTS IN PRESS

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