title: Endoscopist experience as a risk factor for colonoscopic complications.
abstract: OBJECTIVE
  We aimed to determine the incidence of colonic perforation (CP) following colonoscopy and postpolypectomy bleeding (PPB) in a teaching hospital, assessing the influence of endoscopist experience as a risk factor.
  
  
  METHODS
  All colonoscopies performed between 1995 and 2008 were reviewed. Demographic data, endoscopic procedure information, incidence of CP and PPB, and endoscopist experience were recorded.
  
  
  RESULTS
  In the 14-year period, 25,214 endoscopic colonic procedures were performed, and 3991 patients underwent polypectomy. The overall CP risk was 0.51/1000 procedures; and PPB 14.7/1000. The relative risk (RR) ratio of complications was 2.8/1000 procedures. The RR rate was highest for endoscopists performing less than 591 procedures per year (4.0/1000 [95% CI, 3.7-4.3] vs 2.9/1000 [95% CI, 2.6-3.2]), P < 0.001).
  
  
  CONCLUSIONS
  The complication rate after colonoscopy was comparable to that previously reported. Colonoscopy carried out by a low-volume endoscopist was independently associated with bleeding and perforation.
authors.affiliation: Endoscopy Unit, Department of Gastroenterology, Hospital Universitari Germans Trias i Pujol, Badalona, Spain. vlorenzo.germanstrias@gencat.cat
authors.forename: V
authors.initials: V
authors.lastname: Lorenzo-Zúñiga
authors.forename: V
authors.initials: V
authors.lastname: Moreno de Vega
authors.forename: E
authors.initials: E
authors.lastname: Doménech
authors.forename: M
authors.initials: M
authors.lastname: Mañosa
authors.forename: R
authors.initials: R
authors.lastname: Planas
authors.forename: J
authors.initials: J
authors.lastname: Boix
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002983:Clinical Competence; D003108:Colonic Diseases / Q000453:epidemiology / Q000209:etiology*; D003111:Colonic Polyps / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D003113:Colonoscopy / Q000009:adverse effects*; D005260:Female; D005762:Gastroenterology; D006801:Humans; D007416:Intestinal Perforation / Q000453:epidemiology / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D019106:Postoperative Hemorrhage / Q000453:epidemiology / Q000209:etiology*; D012189:Retrospective Studies; D012307:Risk Factors