Independent risk factors for diversion colitis: a retrospective case-control study

Area of Science:

• Colorectal Surgery
• Gastroenterology
• Surgical Pathology

Background:

• Diversion colitis is a complication arising from the surgical interruption of fecal flow in the non-functional colon.
• Understanding its risk factors is crucial for preventing patient morbidity following rectal cancer surgery.

Purpose of the Study:

• To identify independent risk factors associated with the development of diversion colitis in patients who underwent low anterior resections with prophylactic ileostomies.

Main Methods:

• A retrospective study of 163 patients undergoing low anterior resection and prophylactic ileostomy for rectal cancer.
• Colonoscopy results and clinical data were analyzed, including ileostomy type, diversion duration, and patient comorbidities.
• Univariate and multivariate analyses were performed to determine significant risk factors.

Main Results:

• The overall incidence of diversion colitis was 53.4%.
• Independent risk factors identified include single-lumen prophylactic ileostomy (OR 4.481), diversion time of 90 days or longer (OR 4.474), and pre-existing inflammatory bowel disease (OR 7.491).
• Radiotherapy was not found to be a significant risk factor.

Conclusions:

• Single-lumen prophylactic ileostomy, prolonged diversion time (≥90 days), and inflammatory bowel disease are significant independent risk factors for diversion colitis.
• These findings can inform surgical strategies to mitigate the risk of diversion colitis.