S1945 Natural History of Crohn’s Disease and Ulcerative Colitis in Newly Diagnosed Hispanic Adults in the United States: A Population-Based Cohort Study

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Introduction: We conducted a retrospective cohort study examining the natural history of inflammatory bowel diseases (IBD) in Hispanics, compared with Whites in the United States. Methods: Using an administrative claims database (OptumLabs® Data Warehouse), we created an inception cohort of adults newly diagnosed with IBD diagnosed with IBD (91% positive predictive value) between 2007-23. We examined and compared cumulative risk of hospitalization, IBD-related surgery and treatment patterns in patients with Crohn’s disease (CD) and ulcerative colitis (UC) between Hispanics and Whites, and examined the interaction between race/ethnicity and education and income as surrogate measures of social risk. Results: We included 520 Hispanic adults with incident IBD (211 with CD, 309 with UC) compared with 5484 Whites with incident IBD (2447 with CD, 3037 with UC). Among patients with CD, the cumulative 5-y risk of all-cause hospitalization and surgery was 17.7% and 11.5%, respectively, and was similar to the risk observed in Whites. While there were no differences in risk of corticosteroid use (Hispanics vs Whites, 5 y risk: 70.0% vs 69.4%, P = 0.59), utilization of immunomodulators (24.2% vs 33.1%, P = 0.047) and advanced therapies (35.8% vs 48.1%, P = 0.001) was lower in Hispanic patients. Among patients with UC, the cumulative 5-y risk of all-cause hospitalization was lower in Hispanics (10.5% vs 17.6%, P = 0.034), without differences in risk of surgery (3.8% vs 6.3%, P = 0.22). While the risk of corticosteroid use was lower in Hispanics vs Whites (5 y risk: 60.6% vs 72.7%, P = 0.002), no differences were observed in the use of immunomodulator (15.4% vs 19.8%, P = 0.057) or advanced therapies (29.2% vs 29.2%, P = 0.63). Higher education level, but not income, was associated with lower risk of corticosteroid use and higher risk of advanced therapy use. There was no significant interaction between race, education or income and IBD outcomes. Conclusion: In an inception cohort of newly diagnosed patients with IBD, the natural history of CD was similar between Hispanics vs Whites, though utilization of advanced therapies and immunomodulators was lower. In contrast, Hispanic adults with UC had lower risk of hospitalization and need for corticosteroids compared with Whites, but without significant differences in utilization of advanced therapies. Education and income level did not explain differences observed between Hispanics vs Whites.

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