Relationship Between Stages of Ileal Pouch-Anal Anastomosis, Timing of Restoration of Fecal Continuity, and Pouchitis.

Background: The most common complication following ileal pouch-anal anastomosis (IPAA) in patients with ulcerative colitis (UC) is pouchitis.

Aims: We aimed to investigate whether a shorter period between pouch creation and restoration of fecal flow through an IPAA was associated with an increased risk of development of pouchitis within the first 2 years after IPAA.

Methods: We performed a retrospective cohort study evaluating patients undergoing colectomy with IPAA for UC between January 1, 2004 and December 31, 2016. We used Kaplan-Meier testing and Cox Proportional Hazards Modeling to evaluate the relationship between the time between restoration of fecal continuity and time to subsequent development of pouchitis, adjusting for other clinical and demographic factors.

Results: We identified 624 patients who underwent proctocolectomy with IPAA for UC, of whom 246 (39%) developed pouchitis within the first 2 years after IPAA. There was no difference when comparing the median time to restoration of continuity among those patients who developed pouchitis and those who did not (49 days vs. 49 days, p = 0.85) or in multivariable analysis. Primary sclerosing cholangitis (Hazard Ratio [HR] 2.14, 95% CI 1.12-4.08), family history of inflammatory bowel disease (HR 1.49, 95% CI 1.08-2.06), and delayed pouch creation (HR 0.75, 95% CI 0.57-1.00) were significantly associated with time to development of pouchitis.

Conclusion: Although a staged approach to IPAA may have benefits in the surgical management of UC, the timing interval between pouch creation and restoration of continuity did not impact the subsequent development of early pouchitis in this cohort.