Abstract A011: Building a data resource to advance research on early-onset colorectal cancer: The consortium for research on early-onset colorectal cancer (CREO)
Authors: Coronado Gloria D. , Burnett-Hartman Andrea , Lee Jeffrey , McMullen Carmit , Rutter Carolyn , McBurnie Mary Ann , Neslund-Dudas Christine , Carethers John 
Published: December 2022

Abstract
Introductory sentence indicating purpose of the study: Over the last three decades, incidence of colorectal cancer (CRC) has risen steadily among people younger than age 50 (early-onset) in many developed countries, including the United States. More information is needed about the causes of early-onset CRC and novel, pragmatic interventions are needed to ensure rapid identification of early-onset CRC cases through timely screening and symptoms detection. Brief description of pertinent experimental procedures: The Consortium for Research on Early-Onset Colorectal Cancer (CREO) is a partnership among scientists and clinicians at four data-contributing health systems: Kaiser Permanente Northwest, Kaiser Permanente Northern California, and Kaiser Permanente Colorado, and Henry Ford Health. CREO plans to assemble a novel cohort of 8 million adults (including 3,200 early-onset CRC cases diagnosed from 2010 through 2025) encompassing electronic health record, survey, and biospecimen data to conduct research that will identify and estimate the impact of approaches to rapidly detect early-onset CRC through screening and clinical practice. Using electronic health record data from our participating health systems, we identified individuals diagnosed with CRC between 2010 and 2020. Here, we describe demographic and tumor characteristics of individuals with CRC in this cohort, and compare those to national data obtained from the Surveillance, Epidemiology, and End-Results program for the years 2012 – 2016. Summary of the new, unpublished data: We identified 15,884 adults with CRC (1,932 with early-onset CRC and 13,912 with late-onset CRC) in the four participating CREO health systems. Individuals with early-onset CRC in the CREO cohort were non-Hispanic White (54%), Hispanic (18%), Asian-American (14%), and African American/Black (9%). The proportion of CREO cohort adults with early-onset CRC was 12%; this matched the proportion in the population-based SEER data. The proportion of diagnosed CRC cases located in the rectum was 29% in both the CREO cohort and in SEER data. Anatomic location for the remaining tumors varied slightly between the CREO cohort and SEER data: in CREO data, 22% were proximal colon cancers, and 31% were distal colon cancers; in SEER data, and 29% were proximal and 22% were distal. Statement of the conclusions: Our findings show that CREO’s assembled cohort of electronic health record data from multiple large health systems matches several key aspects of population-based data from SEER. Through CREO, we plan to create a comprehensive, multi-level dataset of a new, racially and ethnically diverse cohort of 8 million adults in order to elucidate factors associated with the alarming rise in early-onset CRC and identify interventions to ensure rapid identification and secondary prevention of early-onset CRC.
Citation Format: Gloria D. Coronado, Andrea Burnett-Hartman, Jeffrey Lee, Carmit McMullen, Carolyn Rutter, Mary Ann McBurnie, Christine Neslund-Dudas, John Carethers. Building a data resource to advance research on early-onset colorectal cancer: The consortium for research on early-onset colorectal cancer (CREO) [abstract]. In: Proceedings of the AACR Special Conference on Colorectal Cancer; 2022 Oct 1-4; Portland, OR. Philadelphia (PA): AACR; Cancer Res 2022;82(23 Suppl_1):Abstract nr A011.