Endoscopy 2020; 52(01): 61-67
DOI: 10.1055/a-1031-5672
Original article
© Georg Thieme Verlag KG Stuttgart · New York

Serrated polyp detection rate and advanced adenoma detection rate from a US multicenter cohort

Jagpal S. Klair
1  Division of Gastroenterology and Hepatology, University of Iowa Hospital and Clinics, Iowa City, Iowa, United States
,
Munish Ashat
1  Division of Gastroenterology and Hepatology, University of Iowa Hospital and Clinics, Iowa City, Iowa, United States
,
Dane Johnson
2  Division of Gastroenterology and Hepatology, University of Alabama, Birmingham, Alabama, United States
,
Sumant Arora
1  Division of Gastroenterology and Hepatology, University of Iowa Hospital and Clinics, Iowa City, Iowa, United States
,
Nirmal Onteddu
3  Division of Gastroenterology and Hepatology, Medical Center Hospital, Odessa, Texas, United States
,
Jose G. Machain Palacio
4  Division of Gastroenterology and Hepatology, CHI Creighton University School of Medicine, Omaha, Nebraska, United States
,
Ronald Samuel
5  Division of Gastroenterology and Hepatology, University of Texas Medical Branch Galveston, Texas, United States
,
Mohammad Bilal
5  Division of Gastroenterology and Hepatology, University of Texas Medical Branch Galveston, Texas, United States
,
Avanija Buddam
4  Division of Gastroenterology and Hepatology, CHI Creighton University School of Medicine, Omaha, Nebraska, United States
,
Ashutosh Gupta
3  Division of Gastroenterology and Hepatology, Medical Center Hospital, Odessa, Texas, United States
,
Alan Gunderson
1  Division of Gastroenterology and Hepatology, University of Iowa Hospital and Clinics, Iowa City, Iowa, United States
,
Praveen Guturu
5  Division of Gastroenterology and Hepatology, University of Texas Medical Branch Galveston, Texas, United States
,
Kaartik Soota
2  Division of Gastroenterology and Hepatology, University of Alabama, Birmingham, Alabama, United States
,
Subhash Chandra
4  Division of Gastroenterology and Hepatology, CHI Creighton University School of Medicine, Omaha, Nebraska, United States
,
Arvind R. Murali
1  Division of Gastroenterology and Hepatology, University of Iowa Hospital and Clinics, Iowa City, Iowa, United States
› Author Affiliations
Further Information

Publication History

submitted 14 June 2019

accepted after revision 07 October 2019

Publication Date:
18 November 2019 (online)

Abstract

Background Interval colorectal cancers may be associated with a low serrated polyp detection rate (SDR) and advanced adenoma detection rate (AADR). We aimed to determine the SDR and AADR for endoscopists in a United States multicenter cohort.

Methods We included average-risk screening colonoscopies from five medical centers in the United States. Endoscopists with data on at least 100 average-risk screening colonoscopies were included. We calculated median SDR and AADR for endoscopists with adequate adenoma detection rates (ADRs) > 25 %. We analyzed the relationship between ADR and SDR, and between ADR and AADR using nonparametric Spearman correlation coefficients, scatter plots, and linear regression.

Results We included 3513 screening colonoscopies performed by 26 gastroenterologists. The mean age of patients was 56.8 years (SD 7.4) and 1585 (45 %) were male. All but one endoscopist had an ADR above 25 %. There was a significant positive but modest correlation between ADR and SDR (rho = 0.67, P < 0.01), and between ADR and AADR (rho = 0.56, P < 0.01). For endoscopists with an adequate ADR, median (interquartile range) ADR was 43 % (32.0 % – 48.6 %), median SDR was 8.4 % (7.3 % – 11.4 %), and median AADR was 9.3 % (6.4 % – 12.6 %).

Conclusion A significant percentage of endoscopists have either a low SDR or low AADR despite an adequate ADR, justifying the need for separate SDR and AADR benchmarks. Based on our multicenter cohort, endoscopists with adequate ADRs had a median SDR and median AADR of about 8 % and 9 %, respectively.