title: Diagnostic yield of open access colonoscopy according to appropriateness.
abstract: BACKGROUND
  Open-access endoscopy allows physicians to directly schedule endoscopic procedures for their patients without prior consultation. Evaluation of both appropriateness and diagnostic yield of endoscopic procedures is critical when assessing the costs and benefits of endoscopy in an open-access setting. The aim of this study was to assess the appropriate use of colonoscopy in an open-access system and to establish the yield of diagnostic information relevant to patient care.
  
  
  METHODS
  Overall, 1123 consecutive patients referred for open-access colonoscopy were prospectively enrolled in the study. The American Society for Gastrointestinal Endoscopy (ASGE) guidelines were used to assess the relationship between the appropriate use of colonoscopy and the presence of relevant endoscopic findings.
  
  
  RESULTS
  The rate of colonoscopies "generally not indicated" according to ASGE guidelines was 29% (39% for primary care physicians and 23% for specialists; p < 0.0001). A relevant endoscopic finding was detected in 338 examinations (35%). The diagnostic yield was significantly higher for "generally indicated" colonoscopies (43%) compared with "generally not indicated" procedures (16%) (p < 0.001).
  
  
  CONCLUSIONS
  Although the rate of inappropriate use of colonoscopy was high, open-access colonoscopy was effective in detecting neoplastic lesions. Because most of these were detected during examinations performed for appropriate indications, the appropriateness of the indication emerges as crucial to the cost-effectiveness of an open-access system.
authors.affiliation: Department of Gastroenterology and Digestive Endoscopy, Nuovo Regina Margherita Hospital, Rome, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Morini
authors.forename: C
authors.initials: C
authors.lastname: Hassan
authors.forename: G
authors.initials: G
authors.lastname: Meucci
authors.forename: A
authors.initials: A
authors.lastname: Toldi
authors.forename: A
authors.initials: A
authors.lastname: Zullo
authors.forename: G
authors.initials: G
authors.lastname: Minoli
mesh_terms: D003108:Colonic Diseases / Q000175:diagnosis; D003113:Colonoscopy / Q000379:methods*; D015179:Colorectal Neoplasms / Q000175:diagnosis* / Q000601:surgery*; D003362:Cost-Benefit Analysis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017410:Practice Guidelines as Topic; D011446:Prospective Studies