Retrospective Cohort Study
Copyright ©The Author(s) 2025. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastrointest Endosc. Jun 16, 2025; 17(6): 108146
Published online Jun 16, 2025. doi: 10.4253/wjge.v17.i6.108146
Advantages of new generation colonoscopes on adenoma detection: A propensity-score matching study
Toshihiro Nishizawa, Osamu Toyoshima, Shuntaro Yoshida, Yoshiyuki Takahashi, Hideki Nakagawa, Hiroya Mizutani, Yosuke Kataoka, Takamitsu Kanazawa, Hirotoshi Ebinuma, Keisuke Hata
Toshihiro Nishizawa, Hirotoshi Ebinuma, Department of Gastroenterology and Hepatology, International University of Health and Welfare, Narita Hospital, Narita 286-8520, Japan
Toshihiro Nishizawa, Osamu Toyoshima, Shuntaro Yoshida, Yoshiyuki Takahashi, Hideki Nakagawa, Hiroya Mizutani, Yosuke Kataoka, Takamitsu Kanazawa, Keisuke Hata, Department of Gastroenterology, Toyoshima Endoscopy Clinic, Tokyo 157-0066, Japan
Hideki Nakagawa, Hiroya Mizutani, Department of Gastroenterology, Graduate School of Medicine, University of Tokyo, Tokyo 113-8655, Japan
Takamitsu Kanazawa, Department of Gastroenterology, JR Tokyo General Hospital, Tokyo 151-8528, Japan
Keisuke Hata, Department of Surgical Oncology, University of Tokyo, Tokyo 1138655, Japan
Author contributions: Nishizawa T was responsible for endoscopic diagnosis, article writing, and statistical analysis; Toyoshima O was responsible for endoscopic diagnosis and statistical analysis; Yoshida S, Takahashi Y, Nakagawa H, Mizutani H, Kataoka Y, and Kanazawa T were responsible for endoscopic diagnosis; Ebinuma H was responsible for provision of literature and expenses related to the research; Hata K was responsible for final scrutiny of the study; all authors contributed to the study design, article review, and final manuscript approval.
Institutional review board statement: This study was approved by the Ethics Committee of the Certified Institutional Review Board of the Yoyogi Mental Clinic (No. RKK227).
Informed consent statement: The need for patient consent was waived due to the retrospective nature of the study.
Conflict-of-interest statement: The authors declare no conflicts of interest associated with this manuscript.
STROBE statement: The authors have read the STROBE Statement—checklist of items, and the manuscript was prepared and revised according to the STROBE Statement—checklist of items.
Data sharing statement: No additional data are available.
Open Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Osamu Toyoshima, MD, PhD, Director, Department of Gastroenterology, Toyoshima Endoscopy Clinic, 6-17-5 Seijo, Setagaya-Ku, Tokyo 157-0066, Japan. t@ichou.com
Received: April 7, 2025
Revised: April 17, 2025
Accepted: May 20, 2025
Published online: June 16, 2025
Processing time: 66 Days and 4.4 Hours
Core Tip

Core Tip: Recently, Olympus Corporation released new scopes (XZ1200/EZ1500). This propensity score matching study showed that the new scopes (CF-XZ1200/CF-EZ1500) enhanced the detection of adenomas and sessile serrated lesions compared to the old ones (290 series). The improvement in image quality with this model change was remarkable.