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Updated: Jan 6, 2026

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Use of 2 Observers Increases Adenoma Detection Rate During Colonoscopy: Systematic Review and Meta-analysis
Muhammad Aziz1, Simcha Weissman2, Zubair Khan1
1Department of Internal Medicine, University of Toledo Medical Center, Toledo, Ohio.
Abstract:
Current efforts are directed toward improving quality metrics such as adenoma/polyp detection rates during colonoscopy to decrease the incidence of colorectal cancer.1 Previous studies have reported variable detection rates for adenomas/polyps during colonoscopy for active participation/observation by nurses, trainees, and/or technician (dual observer [DO] group) with an endoscopist.2,3 We performed a systematic review and meta-analysis to evaluate the detection rate of adenomas/polyps during colonoscopy via DO versus single observers (ie, endoscopist alone).
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