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©The Author(s) 2025. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastrointest Surg. Sep 27, 2025; 17(9): 109540
Published online Sep 27, 2025. doi: 10.4240/wjgs.v17.i9.109540
Published online Sep 27, 2025. doi: 10.4240/wjgs.v17.i9.109540
Risk factors for inadequate bowel preparation before colonoscopy: A retrospective cohort study
Tong Jin, Hao-Xuan Cheng, Jian-Yu Hao, Chao Li, Department of Gastroenterology, Beijing Chao-Yang Hospital Affiliated to Capital Medical University, Beijing 100020, China
Co-first authors: Tong Jin and Hao-Xuan Cheng.
Co-corresponding authors: Jian-Yu Hao and Chao Li.
Author contributions: Jin T and Cheng HX contributed to the drafting and revision of the manuscript; Jin T and Li C were responsible for data collection and analysis; Hao JY and Li C contributed to study design, project supervision, and guidance on manuscript revision; All authors have read and approved the final manuscript.
Supported by the Beijing Key Clinical Specialty Project.
Institutional review board statement: This study was reviewed and approved by the Ethics Committee of Beijing Chao-Yang Hospital, No. LGH-2024-166.
Informed consent statement: All procedures and protocols were reviewed and approved by the Institutional Review Board prior to the commencement of the study. All study participants, or their legal guardian, provided informed written consent prior to study enrollment.
Conflict-of-interest statement: The authors declare that they have no conflict of interest.
STROBE statement: The authors have read the STROBE Statement—a checklist of items, and the manuscript was prepared and revised according to the STROBE Statement-a checklist of items.
Data sharing statement: The data can be obtained from the correspondence.
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: Chao Li, Associate Chief Nurse, Department of Gastroenterology, Beijing Chao-Yang Hospital Affiliated to Capital Medical University, No. 8 Gongren Tiyuchang South Road, Chaoyang District, Beijing 100020, China. lichaocyyy@126.com
Received: May 27, 2025
Revised: June 21, 2025
Accepted: July 24, 2025
Published online: September 27, 2025
Processing time: 122 Days and 20.1 Hours
Revised: June 21, 2025
Accepted: July 24, 2025
Published online: September 27, 2025
Processing time: 122 Days and 20.1 Hours
Core Tip
Core Tip: This retrospective study analyzed 484 patients undergoing colonoscopy and identified key factors influencing inadequate bowel preparation. History of colorectal surgery and a shorter time interval from the last dose to the start of examination were identified as risk factors, while a 1-day low-residue diet, longer total exercise time after medication, and greater defecation frequency after medication served as protective factors. These findings can help guide targeted interventions to improve bowel preparation quality and enhance diagnostic accuracy during colonoscopy.