title: The day of the week does not affect the adenoma detection rate.
abstract: BACKGROUND
  The role of operator fatigue on adenoma detection rate (ADR) is still controversial.
  
  
  OBJECTIVE
  The purpose of this study was to determine if fatigue towards the end of the week affects the ADR.
  
  
  METHODS
  A retrospective chart review of consecutive colonoscopies was done at a tertiary care teaching institution. Patients 45 years of age or older undergoing screening or surveillance colonoscopy from June 2007 to August 2010 were included in the study.
  
  
  RESULTS
  A total of 3,085 patients were included in the study, with an overall 31 % ADR. ADR was between 31 and 32 % throughout the week, with no statistically significant variation (p = 0.8697). The total number of adenomas and advanced adenomas was also similar throughout the week (p = 0.8, p = 0.59, respectively).
  
  
  CONCLUSIONS
  ADR is not influenced by the day of the week in which a colonoscopy is performed.
authors.affiliation: Digestive Disease Institute, Cleveland Clinic Florida, 2950 Cleveland Clinic Blvd, Weston, FL, 33331, USA, Jimeneb2@ccf.org.
authors.forename: Brenda G
authors.initials: BG
authors.lastname: Jimenez Cantisano
authors.forename: Marlow
authors.initials: M
authors.lastname: Hernandez
authors.forename: Angelica
authors.initials: A
authors.lastname: Ramírez
authors.forename: Fernando J
authors.initials: FJ
authors.lastname: Castro
mesh_terms: D000236:Adenoma / Q000175:diagnosis*; D000368:Aged; D000369:Aged, 80 and over; D003113:Colonoscopy / Q000706:statistics & numerical data; D015179:Colorectal Neoplasms / Q000175:diagnosis*; D055088:Early Detection of Cancer / Q000706:statistics & numerical data; D005221:Fatigue; D005260:Female; D005431:Florida; D006784:Hospitals, Teaching; D006801:Humans; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D019984:Quality Indicators, Health Care; D012189:Retrospective Studies; D012621:Seasons; D013997:Time Factors; D014940:Work Schedule Tolerance