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CC BY 4.0 · Endosc Int Open 2025; 13: a25491033
DOI: 10.1055/a-2549-1033
Original article

Eye movement patterns associated with colorectal adenoma detection: Post hoc analysis of randomized controlled trial

Authors

  • Fumiaki Ishibashi

    1   Department of Gastroenterology, International University of Health and Welfare Ichikawa Hospital, Ichikawa, Japan (Ringgold ID: RIN38259)

  • Kosuke Okusa

    2   Department of Data Science for Business Innovation, Chuo University Faculty of Science and Engineering Graduate School of Science and Engineering, Bunkyo-ku, Japan (Ringgold ID: RIN84021)

  • Mizuki Nagai

    1   Department of Gastroenterology, International University of Health and Welfare Ichikawa Hospital, Ichikawa, Japan (Ringgold ID: RIN38259)

  • Kentaro Mochida

    1   Department of Gastroenterology, International University of Health and Welfare Ichikawa Hospital, Ichikawa, Japan (Ringgold ID: RIN38259)

  • Eri Ozaki

    3   Department of Gastroenterology, Shin Matsudo Central General Hospital, Matsudo, Japan (Ringgold ID: RIN194321)

  • Sho Suzuki 

    1   Department of Gastroenterology, International University of Health and Welfare Ichikawa Hospital, Ichikawa, Japan (Ringgold ID: RIN38259)

Supported by: Japan Society for the Promotion of Science 23K11902 Clinical Trial: Registration number (trial ID): UMIN000051304, Trial registry: UMIN Japan (http://www.umin.ac.jp/english/), Type of Study: Post-hoc analysis of a randomized controlled trial
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Abstract

Background and study aims

The adenoma detection rate is higher among endoscopists who spend more time observing screen edges during colonoscopies. Nonetheless, eye movement parameters related to lesion detection remain unknown. This study aimed to determine the specific eye movement parameters related to colorectal adenoma detection, including the gaze rate in a particular area and eye movement speed.

Patients and methods

This study was a post hoc analysis of a randomized controlled trial investigating the effect of modifying eye movements of endoscopists on colorectal adenoma detection. Gaze rate at a specific area and eye movement speed were calculated based on endoscopist gaze coordinates in each examination. Time required for observation and treatment of polyps was excluded. The lower peripheral area was defined as the bottom row when the screen was divided into 6×6 sections. These parameters were compared between patients with and without adenomas.

Results

Five physicians performed 158 colonoscopies. The adenoma detection group exhibited a lower peripheral gaze rate (13.7% vs. 9.5%, P = 0.004) and smaller average eye movement distance (29.9 pixels/30 ms vs. 33.3 pixels/30 ms, P = 0.022). Logistic regression analysis showed that a lower peripheral gaze rate > 13.0% and an average eye movement distance <30 pixels/30 ms were increased independent predictors of adenoma detection (P = 0.024, odds ratio [OR] 2.53, 95% confidence interval [CI] 1.71-3.28; P = 0.045, OR 4.57, 95% CI 1.03-20.2), whereas age, sex, and withdrawal time were not.

Conclusions

Lower peripheral gaze rate and slow eye movement are associated with colorectal adenoma detection.

Keywords

Endoscopy Lower GI Tract - Polyps / adenomas / ... - Diagnosis and imaging (inc chromoendoscopy, NBI, iSCAN, FICE, CLE...) - Quality and logistical aspects - Training

Supplementary Material



Publication History

Received: 09 December 2024

Accepted after revision: 22 February 2025

Accepted Manuscript online:
28 February 2025

Article published online:
04 April 2025

© 2025. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/).

Georg Thieme Verlag KG
Oswald-Hesse-Straße 50, 70469 Stuttgart, Germany

Bibliographical Record
Fumiaki Ishibashi, Kosuke Okusa, Mizuki Nagai, Kentaro Mochida, Eri Ozaki, Sho Suzuki. Eye movement patterns associated with colorectal adenoma detection: Post hoc analysis of randomized controlled trial. Endosc Int Open 2025; 13: a25491033.
DOI: 10.1055/a-2549-1033
 

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