title: Risk factors and indications for colectomy in ulcerative colitis patients are different according to patient's clinical background.
abstract: OBJECTIVE
  Despite progress in medical treatment for ulcerative colitis, a considerable fraction of ulcerative colitis patients undergo colectomy. We analyzed the clinical variables of ulcerative colitis patients and determined the risk factors and indications for colectomy.
  
  
  METHODS
  The clinical records of 981 consecutive Japanese patients with ulcerative colitis were reviewed both retrospectively and prospectively.
  
  
  RESULTS
  Of 981 patients with ulcerative colitis, 85 patients underwent colectomy. Multivariate analysis indicated that male gender (risk ratio, 2.16; 95 percent confidence interval, 1.37-3.42), onset year during and after 2000 (risk ratio, 2.85; 95 percent confidence interval, 1.31-6.22), severe disease activity (risk ratio, 2; 95 percent confidence interval, 1.15-3.48), corticosteroid resistance (risk ratio, 7.05; 95 percent confidence interval, 4.29-11.59), and complications because of corticosteroid administration (risk ratio, 3.55; 95 percent confidence interval, 2.08-6.06) were significant risk factors for colectomy. In patients with disease duration of more than five years, only corticosteroid resistance and complications because of corticosteroid were significant risk factors for colectomy. When we stratified indications for colectomy for the 85 cases via patient disease duration, massive hemorrhage was a relatively frequent cause of colectomy in patients with a disease duration of less than five years (P = 0.091). On the other hand, colon dysplasia or cancer was a major cause for colectomy in patients with a disease duration of more than ten years (P = 0.0001).
  
  
  CONCLUSIONS
  In ulcerative colitis patients, the risk factors and indications for colectomy were different according to the patient's clinical background. Our findings may help to predict patients with ulcerative colitis who have a high risk for colectomy.
authors.affiliation: Department of Gastroenterology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Okayama 700-8558, Japan.
authors.forename: Motoaki
authors.initials: M
authors.lastname: Kuriyama
authors.forename: Jun
authors.initials: J
authors.lastname: Kato
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Fujimoto
authors.forename: Junichirou
authors.initials: J
authors.lastname: Nasu
authors.forename: Jiro
authors.initials: J
authors.lastname: Miyaike
authors.forename: Takechiyo
authors.initials: T
authors.lastname: Morita
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Okada
authors.forename: Seiyuu
authors.initials: S
authors.lastname: Suzuki
authors.forename: Junji
authors.initials: J
authors.lastname: Shiode
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yamamoto
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Shiratori
mesh_terms: D000305:Adrenal Cortex Hormones / Q000627:therapeutic use; D000328:Adult; D017668:Age of Onset; D003082:Colectomy / Q000009:adverse effects; D003093:Colitis, Ulcerative / Q000188:drug therapy / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D012307:Risk Factors
chemical_list: D000305:Adrenal Cortex Hormones