Disease course and treatment outcomes of Crohn's disease patients with early or late surgery-A Danish nationwide cohort study from 1997 to 2015

Background: Studies on early surgery among Crohn's disease patients are few and focus on ileocolonic resections.Aim: The aim of this nationwide cohort study was to investigate the disease course in all Crohn's disease patients who underwent early and late major abdominal surgery.Methods: In a Danish nationwide cohort of Crohn's disease patients from 1997 to 2015 we included 493 patients (group 1) resected within 29 days, 472 patients (group 2) resected between 30 and 180 days, and 1,518 patients (group 3) resected after 180 days of diagnosis. Re-operation, hospitalisations and medications were analysed.Results: The cumulative risk of re-operation was lower among patients from group 1 (five-year risk: 16.5% vs. group 2: 18.2% and group 3: 21.2%, p = 0.004). Fewer patients from group 2 and 3 required hospitalisations (269 (56.5%) and 803 (52.8%) vs. group 1: 329 (66.8%) p < 0.001). Patients from group 3 had a higher cumulative use of immunomodulators in the first three years after initial surgery (one-year risk: 24.6% vs. group 1: 19.4% and group 2: 17.0%, p < 0.001).Conclusion: Crohn's disease patients resected within 29 days of diagnosis had a lower cumulative risk of re-operation and a lower cumulative exposure to immunomodulators in the initial years after surgery.& COPY; 2022 The Author(s). Published by Elsevier Ltd on behalf of Editrice Gastroenterologica Italiana S.r.l. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )

Automated summary

This nationwide cohort study aimed to investigate the disease course in Crohn's disease patients who underwent early and late major abdominal surgery. The study found that patients who underwent surgery within 29 days of diagnosis had a lower cumulative risk of re-operation and a shorter cumulative exposure to immunomodulators in the initial years after surgery.