title: Adenoma detection rates in an opportunistic screening colonoscopy program in Iran, a country with rising colorectal cancer incidence.
abstract: BACKGROUND
  Data on the quality of colonoscopies in populations with rising colorectal cancer (CRC) incidence is scarce. We aimed to calculate the adenoma detection rates (ADR), and assess the quality of colonoscopies in an opportunistic screening colonoscopy program in Iran.
  
  
  METHODS
  All the colonoscopy and pathology reports of asymptomatic adults over age 50 who underwent screening colonoscopy between June 2007 and March 2013 were reviewed. The colonoscopy quality indicators including ADR were calculated, and patient factors associated with the adenoma detection were determined.
  
  
  RESULTS
  A total of 713 asymptomatic adults aged 50 years and older who underwent their first-time screening colonoscopy were included in this study. ADR and advanced-ADR were 33.00% (95% CI: 29.52-36.54) and 13.18% (95% CI: 10.79-15.90), respectively. We observed a significantly higher rate of cecal intubation in patients with fair or better bowel preparation compared to those with poor prep, 90.00% vs. 70.45%, respectively (P < 0.001). Bowel preparation (adjusted OR: 2.49, 95% CI: 1.75-3.55), older age (≥60) (adjusted OR: 1.70, 95% CI: 1.22-2.36), and male gender (adjusted OR: 1.39, 95% CI: 1.01-1.92) were associated with the adenoma detection.
  
  
  CONCLUSIONS
  Our ADR in both genders meets and exceeds the recommended colonoscopy quality benchmarks. The polyp and adenoma detection rates in the current study are comparable to those reported from Western countries where the incidence of CRC is traditionally high. These data are in line with the epidemiologic transition of CRC in Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Delavari
authors.forename: Faraz
authors.initials: F
authors.lastname: Bishehsari
authors.forename: Hamideh
authors.initials: H
authors.lastname: Salimzadeh
authors.forename: Pejman
authors.initials: P
authors.lastname: Khosravi
authors.forename: Farnaz
authors.initials: F
authors.lastname: Delavari
authors.forename: Siavosh
authors.initials: S
authors.lastname: Nasseri-Moghaddam
authors.forename: Shahin
authors.initials: S
authors.lastname: Merat
authors.forename: Reza
authors.initials: R
authors.lastname: Ansari
authors.forename: Homayoon
authors.initials: H
authors.lastname: Vahedi
authors.forename: Bijan
authors.initials: B
authors.lastname: Shahbazkhani
authors.forename: Mehdi
authors.initials: M
authors.lastname: Saberifiroozi
authors.forename: Masoud
authors.initials: M
authors.lastname: Sotoudeh
authors.forename: Reza
authors.initials: R
authors.lastname: Malekzadeh
mesh_terms: D000236:Adenoma / Q000175:diagnosis* / Q000453:epidemiology; D003111:Colonic Polyps / Q000175:diagnosis / Q000453:epidemiology; D003113:Colonoscopy / Q000592:standards*; D015179:Colorectal Neoplasms / Q000175:diagnosis* / Q000453:epidemiology; D055088:Early Detection of Cancer / Q000379:methods / Q000592:standards*; D005260:Female; D006801:Humans; D015994:Incidence; D007492:Iran / Q000453:epidemiology; D008297:Male; D008403:Mass Screening / Q000379:methods / Q000592:standards*; D008875:Middle Aged; D019984:Quality Indicators, Health Care; D012189:Retrospective Studies