title: Adenoma Detection Rate in Colonoscopy: Is Indication a Predictor?
abstract: OBJECTIVE
  To describe factors that may influence adenoma detection rate (ADR), with an emphasis on the indication for colonoscopy.
  
  
  METHODS
  Consecutive colonoscopies performed by a single endoscopist between January 2008 and December 2014 were reviewed. Indications for colonoscopy were tested for association with ADR after adjusting for age and sex.
  
  
  RESULTS
  A total of 2648 colonoscopies were analyzed. Adenomas were detected in 630 patients (23.8%). Overall ADR was 22.9% in patients undergoing screening colonoscopy. ADR was higher in fecal occult blood test-triggered screening colonoscopies (32%) than colonoscopies performed for patients with a family history of colorectal cancer (21.7%) or asymptomatic average-risk individuals (20.4%) (P=0.05). ADR was 36.1% in patients undergoing surveillance colonoscopy and ranged from 12% to 30% in patients with gastrointestinal symptoms undergoing diagnostic colonoscopy.
  
  
  CONCLUSIONS
  ADR differs depending on whether the indication is screening, surveillance, or diagnosis. Within screening colonoscopies, ADR seems to be higher in patients with a positive fecal occult blood test.
authors.affiliation: *Department of Surgery, Prince of Wales Hospital †Prince of Wales Clinical School, Faculty of Medicine, University of New South Wales ‡Department of Surgery, Prince of Wales Private Hospital, NSW, Australia.
authors.forename: Phillip F
authors.initials: PF
authors.lastname: Yang
authors.forename: Shing W
authors.initials: SW
authors.lastname: Wong
mesh_terms: D000236:Adenoma / Q000175:diagnosis* / Q000453:epidemiology; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003113:Colonoscopy / Q000379:methods*; D015179:Colorectal Neoplasms / Q000175:diagnosis* / Q000453:epidemiology; D055088:Early Detection of Cancer; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D008297:Male; D008403:Mass Screening / Q000379:methods*; D008875:Middle Aged; D009517:New South Wales / Q000453:epidemiology; D012189:Retrospective Studies; D015996:Survival Rate / Q000639:trends; D055815:Young Adult