title: Mean Polyp per Patient Is an Accurate and Readily Obtainable Surrogate for Adenoma Detection Rate: Results from an Opportunistic Screening Colonoscopy Program.
abstract: BACKGROUND The incidence of colorectal cancer is rising in several developing countries. In the absence of integrated endoscopy and pathology databases, adenoma detection rate (ADR), as a validated quality indicator of screening colonoscopy, is generally difficult to obtain in practice. We aimed to measure the correlation of polyp-related indicators with ADR in order to identify the most accurate surrogate(s) of ADR in routine practice. METHODS We retrospectively reviewed the endoscopic and histopathological findings of patients who underwent colonoscopy at a tertiary gastrointestinal clinic. The overall ADR and advanced-ADR were calculated using patient-level data. The Pearson's correlation coefficient (r) was applied to measure the strength of the correlation between the quality metrics obtained by endoscopists. RESULTS A total of 713 asymptomatic adults aged 50 and older who underwent their first-time screening colonoscopy were included in this study. The 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 good correlations between polyp detection rate (PDR) and ADR (r=0.93), and mean number of polyp per patient (MPP) and ADR (r=0.88) throughout the colon. There was a positive, yet insignificant correlation between advanced ADRs and non-advanced ADRs (r=0.42, p=0.35). CONCLUSION MPP is strongly correlated with ADR, and can be considered as a reliable and readily obtainable proxy for ADR in opportunistic screening colonoscopy programs.
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran ; Sasan Alborz Biomedical Research Center, Masoud Gastroenterology and Hepatology Clinic, Tehran, Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Delavari
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Hamideh
authors.initials: H
authors.lastname: Salimzadeh
authors.affiliation: Department of Internal Medicine, Division of Gastroenterology, Rush University Medical Center, Chicago, IL, USA.
authors.forename: Faraz
authors.initials: F
authors.lastname: Bishehsari
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Elham
authors.initials: E
authors.lastname: Sobh Rakhshankhah
authors.affiliation: Non-Communicable Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Farnaz
authors.initials: F
authors.lastname: Delavari
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Shirin
authors.initials: S
authors.lastname: Moossavi
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran ; Sasan Alborz Biomedical Research Center, Masoud Gastroenterology and Hepatology Clinic, Tehran, Iran.
authors.forename: Pejman
authors.initials: P
authors.lastname: Khosravi
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran ; Sasan Alborz Biomedical Research Center, Masoud Gastroenterology and Hepatology Clinic, Tehran, Iran.
authors.forename: Siavosh
authors.initials: S
authors.lastname: Nasseri-Moghaddam
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran ; Sasan Alborz Biomedical Research Center, Masoud Gastroenterology and Hepatology Clinic, Tehran, Iran.
authors.forename: Shahin
authors.initials: S
authors.lastname: Merat
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran ; Sasan Alborz Biomedical Research Center, Masoud Gastroenterology and Hepatology Clinic, Tehran, Iran.
authors.forename: Reza
authors.initials: R
authors.lastname: Ansari
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran ; Sasan Alborz Biomedical Research Center, Masoud Gastroenterology and Hepatology Clinic, Tehran, Iran.
authors.forename: Homayoon
authors.initials: H
authors.lastname: Vahedi
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran ; Sasan Alborz Biomedical Research Center, Masoud Gastroenterology and Hepatology Clinic, Tehran, Iran.
authors.forename: Bijan
authors.initials: B
authors.lastname: Shahbazkhani
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran ; Sasan Alborz Biomedical Research Center, Masoud Gastroenterology and Hepatology Clinic, Tehran, Iran.
authors.forename: Mehdi
authors.initials: M
authors.lastname: Saberifiroozi
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran ; Sasan Alborz Biomedical Research Center, Masoud Gastroenterology and Hepatology Clinic, Tehran, Iran.
authors.forename: Masoud
authors.initials: M
authors.lastname: Sotoudeh
authors.affiliation: Digestive Oncology Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran ; Sasan Alborz Biomedical Research Center, Masoud Gastroenterology and Hepatology Clinic, Tehran, Iran.
authors.forename: Reza
authors.initials: R
authors.lastname: Malekzadeh
keywords: ADR; Colon cancers; Colonic polyps; MPP; Screening colonoscopy