Esophagus to Small Intestine

Aliment Pharmacol Ther. 2023;57(9):1004−13

Atia O, Goren I, Fischler TS, Loewenberg Weisband Y, Greenfeld S, Kariv R, Ledderman N, Matz E, Rimon RM, Dotan I, Turner D, Yanai H

5-aminosalicylate maintenance is not superior to no maintenance in patients with newly diagnosed Crohn’s disease: A nationwide cohort study


Background: 5-aminosalicylates (5-ASA) are widely used in Crohn’s disease (CD) despite guidelines advising otherwise. The authors aimed to assess in nationwide study the outcomes of first-line 5-ASA maintenance therapy (5-ASA-MT) compared with no maintenance treatment (no-MT) in patients with newly diagnosed CD.
Methods: They utilized data from the epi-IIRN cohort, including all patients with CD diagnosed in Israel between 2005 and 2020. Propensity score (PS) matching was utilized to compare outcomes in the 5-ASA-MT versus no-MT groups.
Results: Of the 19,264 patients diagnosed with CD, 8610 (45%) fulfilled the eligibility criteria (3027 [16%] received 5-ASA-MT and 5583 [29%] received no-MT). Both strategies declined over the years; 5-ASA-MT from 21% of CD patients diagnosed in 2005 to 11% in 2019 (p < 0.001) and no-MT from 36% to 23% (p < 0.001). The probability of maintaining therapy at 1, 3 and 5 years from diagnosis: 5-ASA-MT 78%, 57% and 47% and no-MT 76%, 49% and 38%, respectively (p < 0.001). PS analysis successfully matched 1993 pairs of treated and untreated patients and demonstrated comparable outcomes of time to: biologic (p = 0.2), steroid dependency (p = 0.9), hospitalization (p = 0.5) and CD-related surgery (p = 0.1). Rates of acute kidney injury (5.2% vs. 3.3%; p < 0.001) and pancreatitis (2.4% vs. 1.8%; p = 0.03) were higher in the 5-ASA-MT group compared with the no-MT group but after PS matching the rates of adverse events were similar.

Conclusion: First-line 5-aminosalicylate monotherapy was not superior to no maintenance treatment but associated with slightly higher rates of adverse events, while both strategies have declined over the years. These findings suggest that a subset of patients with mild Crohn’s disease may be offered a watchful waiting approach.

I. Goren, M.D., Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA,
E-Mail: goreni@ccf.org

or

Dr. H. Yanai, Division of Gastroenterology, Rabin Medical Center, Petah Tikva, Israel,
E-Mail: henityanai@gmail.com

DOI: 10.1111/apt.17419

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