title: Risk factors for pouch failure in patients with different phenotypes of Crohn's disease of the pouch.
abstract: BACKGROUND
  Crohn's disease (CD) of the pouch is one of the leading causes of pouch failure in patients with restorative proctocolectomy. Risk factors for pouch failure in these patients are yet to be identified. The aim of the study was to assess risk factors associated with pouch failure in patients with CD of the pouch.
  
  
  METHODS
  All patients with a confirmed diagnosis of CD of the pouch in the Pouchitis Clinic between 2002 and 2007 were evaluated. Patients with familial adenomatous polyposis, normal pouches, pouchitis, cuffitis, surgical complications, and other diseased pouch conditions were excluded. Pouch failure was defined as the requirement for a permanent diversion or pouch resection. Demographic and clinical factors were studied with univariable and multivariable analyses.
  
  
  RESULTS
  A total of 137 patients with CD of the pouch were included. Twenty-two patients (16%) developed pouch failure a median of 6 years after ileostomy takedown. Four of 50 patients (8.0%) with inflammatory CD, 4 of 30 (13.3%) with fibrostenotic CD, and 14 of 57 (24.6%) with fistulizing CD had pouch failure. A Kaplan-Meier plot for time to pouch failure by CD phenotype showed a trend toward association (P = 0.054) in patients with fistulizing CD. Adjusting for age, smoking status, and the use of immunomodulators or biologics, fistulizing CD was not found to be significantly associated with a higher hazard for pouch failure. Younger age, being an ex-smoker, and the use of immunomodulators or biologics were found to increase the hazard of pouch failure.
  
  
  CONCLUSIONS
  Younger age, being an ex-smoker, and the requirement for immunomodulators or biologics were associated with pouch failure. The identification of these risk factors may help delineate the natural history of CD of the pouch and shed light on proper clinical management and prognosis.
authors.affiliation: Pouchitis Clinic, Digestive Disease Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA. shenb@ccf.org
authors.forename: Bo
authors.initials: B
authors.lastname: Shen
authors.forename: Feza H
authors.initials: FH
authors.lastname: Remzi
authors.forename: Aaron
authors.initials: A
authors.lastname: Brzezinski
authors.forename: Rocio
authors.initials: R
authors.lastname: Lopez
authors.forename: Ana E
authors.initials: AE
authors.lastname: Bennett
authors.forename: Ian C
authors.initials: IC
authors.lastname: Lavery
authors.forename: Elaine
authors.initials: E
authors.lastname: Queener
authors.forename: Victor W
authors.initials: VW
authors.lastname: Fazio
mesh_terms: D000328:Adult; D000367:Age Factors; D039021:Colonic Pouches; D003424:Crohn Disease / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D007155:Immunologic Factors / Q000009:adverse effects; D008297:Male; D015999:Multivariate Analysis; D011183:Postoperative Complications; D019449:Pouchitis / Q000150:complications; D016737:Proctocolectomy, Restorative; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects
chemical_list: D007155:Immunologic Factors