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Although achieving histologic remission in ulcerative colitis is established, the incremental benefit of achieving histologic remission in patients with Crohn disease (CD) treated to a target of endoscopic remission is unclear. We evaluated the risk of treatment failure in patients with CD in clinical and endoscopic remission by histologic activity status.

In a single-center retrospective cohort study, we identified adults with active CD who achieved clinical and endoscopic remission through treatment optimization. We evaluated the risk of treatment failure (composite of clinical flare requiring treatment modification, hospitalization, and/or surgery) in patients who achieved histologic remission vs persistent histologic activity through Cox proportional hazard analysis.

Of 470 patients with active CD, 260 (55%) achieved clinical and …