title: Does it matter where you are hospitalized for inflammatory bowel disease? A nationwide analysis of hospital volume.
abstract: OBJECTIVE
  To examine if a high hospital volume was associated with superior outcomes in inflammatory bowel disease (IBD) patients requiring hospitalization.
  
  
  METHODS
  This was a cross-sectional study using data from the Nationwide Inpatient Sample (NIS 2004). IBD-related hospitalizations were identified using appropriate International Classification of Diseases, Ninth revision, Clinical modification (ICD-9-CM) codes. Hospital volume was divided into low, medium, and high by assigning the threshold cutoff values of 1-50, 51-150, and >150 annual IBD hospitalizations, respectively. Our primary outcomes were in-hospital mortality, length of stay, and postoperative complications and stay.
  
  
  RESULTS
  Patients at high-volume centers were more likely to be hospitalized with fistulizing or stricturing disease. The adjusted mortality was lower for IBD-related discharges from high-volume centers for those undergoing abdominal surgery (odds ratio [OR] 0.38, 95% confidence interval [CI] 0.18-0.78), but not among those who did not undergo surgery (OR 0.90, 95% CI 0.53-1.52). Patients at high-volume centers were also more likely to undergo surgery (OR 2.24, 95% CI 1.40-3.58). These differences were more prominent in Crohn's disease than in ulcerative colitis.
  
  
  CONCLUSIONS
  Hospitals with a high annual IBD volume have lower in-hospital mortality among surgical IBD patients. This suggests a need for future research into identifying the quality-of-care measures in IBD and instituting appropriate interventions to improve overall IBD outcomes.
authors.affiliation: Division of Gastroenterology, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA.
authors.forename: Ashwin N
authors.initials: AN
authors.lastname: Ananthakrishnan
authors.forename: Emily L
authors.initials: EL
authors.lastname: McGinley
authors.forename: David G
authors.initials: DG
authors.lastname: Binion
mesh_terms: D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D005260:Female; D017052:Hospital Mortality; D006760:Hospitalization / Q000706:statistics & numerical data*; D006761:Hospitals / Q000706:statistics & numerical data*; D006801:Humans; D015212:Inflammatory Bowel Diseases / Q000453:epidemiology* / Q000401:mortality / Q000628:therapy; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology; D016896:Treatment Outcome; D014481:United States / Q000453:epidemiology