title: Trainee participation is associated with increased small adenoma detection.
abstract: BACKGROUND
  Previous studies examining the effect of fellow participation on adenoma detection rate in colonoscopy have yielded conflicting results, and factors such as adenoma size and location have not been rigorously evaluated.
  
  
  OBJECTIVE
  To examine whether fellow participation during screening, surveillance, or diagnostic colonoscopy affects overall, size-specific, or location-specific adenoma or polyp detection rate.
  
  
  METHODS
  This was a retrospective study of 2430 colonoscopies performed in our ambulatory surgical center between September 2006 and December 2007, comparing adenoma and polyp detection rates of colonoscopies performed by fellows with supervising staff endoscopists (n = 318) with colonoscopies performed by staff endoscopists without fellow participation (n = 2112). Study participants included patients who underwent screening, surveillance, or diagnostic colonoscopies in our GI suite. Logistic regression analysis was used to evaluate the association of fellow participation with adenoma and polyp detection.
  
  
  RESULTS
  There was evidence of a higher rate of small (<5 mm) adenoma detection in colonoscopies with a fellow present (25% vs 17%, P = .001). This remained significant after multiple-testing adjustment (P ≤ .003 considered significant). Findings were similar, although not significant for small polyps (36% vs 29%, P = .007). There was a trend toward increased adenoma detection in colonoscopies with a fellow present compared with those without (30% vs 26%, P = .11). Multivariable adjustment for potentially confounding variables did not alter these associations.
  
  
  CONCLUSIONS
  The study had a retrospective design, and information regarding bowel preparation was not available for 37% of patients.
  
  
  CONCLUSIONS
  Fellow involvement was associated with increased detection rates of small adenomas, providing evidence that the presence of a fellow during colonoscopy plays a role in enhancing the effectiveness of the examination.
authors.affiliation: Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, Florida 32224, USA.
authors.forename: Anna M
authors.initials: AM
authors.lastname: Buchner
authors.forename: Muhammad W
authors.initials: MW
authors.lastname: Shahid
authors.forename: Michael G
authors.initials: MG
authors.lastname: Heckman
authors.forename: Nancy N
authors.initials: NN
authors.lastname: Diehl
authors.forename: Rebecca B
authors.initials: RB
authors.lastname: McNeil
authors.forename: Patrick
authors.initials: P
authors.lastname: Cleveland
authors.forename: Kanwar R
authors.initials: KR
authors.lastname: Gill
authors.forename: Anthony
authors.initials: A
authors.lastname: Schore
authors.forename: Marwan
authors.initials: M
authors.lastname: Ghabril
authors.forename: Massimo
authors.initials: M
authors.lastname: Raimondo
authors.forename: Seth A
authors.initials: SA
authors.lastname: Gross
authors.forename: Michael B
authors.initials: MB
authors.lastname: Wallace
mesh_terms: D000236:Adenoma / Q000175:diagnosis* / Q000473:pathology; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002983:Clinical Competence; D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000473:pathology; D003111:Colonic Polyps / Q000175:diagnosis* / Q000473:pathology; D003113:Colonoscopy / Q000193:education*; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D055815:Young Adult