ArticleThe American journal of gastroenterology2014
Serrated and adenomatous polyp detection increases with longer withdrawal time: results from the New Hampshire Colonoscopy Registry.
Article in The American journal of gastroenterology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02581475 (Efficacy of Segmental Examination Twice of Proximal Colon on Adenoma Detection), which is not on this map. Cited by 103 papers, 4 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Efficacy of Segmental Examination Twice of Proximal Colon on Adenoma Detection: a Prospective, Randomized, Controlled Study
Who cites it
103 citing papers in PubMed, 4 syntheses or guidelines pooled it, 217 citations in OpenAlex.
- Quality indicators for colonoscopy.Gastrointestinal endoscopy · 2024Guideline
- Prevalence and Clinical Features of Sessile Serrated Polyps: A Systematic Review.Gastroenterology · 2020Pooled it
- Colorectal Cancer Screening: Recommendations for Physicians and Patients from the U.S. Multi-Society Task Force on Colorectal Cancer.The American journal of gastroenterology · 2017Guideline
- British Society of Gastroenterology position statement on serrated polyps in the colon and rectum.Gut · 2017Guideline
- Pre-administration of super-low volume polyethylene glycol is as effective as senna laxative as bowel preparation for colonoscopy: a randomized controlled phase 2 trial.Surgical endoscopy · 2022Trial
- Will purposely seeking detect more colorectal polyps than routine performing during colonoscopy?Medicine · 2020Trial
- Impact of an Endoscopic Quality Improvement Program Focused on Adenoma Detection on Sessile Serrated Adenoma/Polyp Detection.Digestive diseases and sciences · 2017Trial
- Water Exchange Method Significantly Improves Adenoma Detection Rate: A Multicenter, Randomized Controlled Trial.The American journal of gastroenterology · 2017Trial
- Detection rates of premalignant polyps during screening colonoscopy: time to revise quality standards?Gastrointestinal endoscopy · 2015Trial
- Association Between Colonoscopy Withdrawal Time and Adenoma Detection: Evidence of a Continuous Dose-Response Relationship.Diagnostics (Basel, Switzerland) · 2026Article
- Bowel Preparation Quality for Optimal Sessile Serrated Lesions Detection: Is Excellent the Enemy of Good?Digestive diseases and sciences · 2026Article
- Calculation and evaluation of the effective withdrawal time of colonoscopy on the basis of internimage.BMC gastroenterology · 2026Article
- Anatomical location of colorectal neoplasia in patients with positive stool test (multitarget stool deoxyribonucleic acid or fecal immunochemical test) results: data from the New Hampshire Colonoscopy Registry.Gastrointestinal endoscopy · 2026Article
- Evaluation of Net Withdrawal Time and Colonoscopy Video Summarization Using Deep Learning Based Automated Temporal Video Segmentation.Journal of imaging informatics in medicine · 2026Article
- Colonoscopy Quality and Strategies for Improvement.Gut and liver · 2026Review
- Optimizing detection and resection of colorectal polyps.Translational gastroenterology and hepatology · 2026Review
- Anatomical Distribution of Polyps Is Different for Men and Women With Positive Stool Tests.JGH open : an open access journal of gastroenterology and hepatology · 2025Article
- Eye movement patterns associated with colorectal adenoma detection: Post hoc analysis of randomized controlled trial.Endoscopy international open · 2025Article
- Impact of a training intervention on upper gastrointestinal endoscopy quality over time: Multicenter comparative cohort study.Endoscopy international open · 2025Article
- Which is the better polyp detection metric: adenomas per colonoscopy or adenoma detection rate? A simulation modeling study.Endoscopy international open · 2024Article
43 more citing papers are in PubMed but not listed here.
Corrections and comments
- Commented on by
- Commented on by
Authors and funding
8 authors at 3 institutions in 1 country.
Funding
Abstract
objectivesDetection and removal of adenomas and clinically significant serrated polyps (CSSPs) is critical to the effectiveness of colonoscopy in preventing colorectal cancer. Although longer withdrawal time has been found to increase polyp detection, this association and the use of withdrawal time as a quality indicator remains controversial. Few studies have reported on withdrawal time and serrated polyp detection. Using data from the New Hampshire Colonoscopy Registry, we examined how an endoscopist's withdrawal time in normal colonoscopies affects adenoma and serrated polyp detection.
methodsWe analyzed 7,996 colonoscopies performed in 7,972 patients between 2009 and 2011 by 42 endoscopists at 14 hospitals, ambulatory surgery centers, and community practices. CSSPs were defined as sessile serrated polyps and hyperplastic polyps proximal to the sigmoid. Adenoma and CSSP detection rates were calculated based on median endoscopist withdrawal time in normal exams. Regression models were used to estimate the association of increased normal withdrawal time and polyp, adenoma, and CSSP detection.
resultsPolyp and adenoma detection rates were highest among endoscopists with 9 min median normal withdrawal time, and detection of CSSPs reached its highest levels at 8-9 min. Incident rate ratios for adenoma and CSSP detection increased with each minute of normal withdrawal time above 6 min, with maximum benefit at 9 min for adenomas (1.50, 95% confidence interval (CI) (1.21, 1.85)) and CSSPs (1.77, 95% CI (1.15, 2.72)). When modeling was used to set the minimum withdrawal time at 9 min, we predicted that adenomas and CSSPs would be detected in 302 (3.8%) and 191 (2.4%) more patients. The increase in detection was most striking for the CSSPs, with nearly a 30% relative increase.
conclusionsA withdrawal time of 9 min resulted in a statistically significant increase in adenoma and serrated polyp detection. Colonoscopy quality may improve with a median normal withdrawal time benchmark of 9 min.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.