Risk factors and prognostic value of acute severe lower gastrointestinal bleeding in Crohn’s disease
Jiyoung Yoon, Dae Sung Kim, Jin Wook Lee, Seung Wook Hong, Ha Won Hwang, Sung Wook Hwang, Sang Hyoung Park, Dong-Hoon Yang, Byong Duk Ye, Jeong-Sik Byeon, Seung-Jae Myung, Suk-Kyun Yang, Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, South Korea
Ye-Jee Kim, Department of Clinical Epidemiology and Biostatistics, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, South Korea
Author contributions: Yoon J and Kim DS equally contributed to this article; Yoon J and Kim DS collected and analyzed data, and drafted the manuscript; Kim YJ supervised the research and contributed to analysis; Lee JW, Hong SW, Hwang HW, Hwang SW, Park SH, Yang DH, Ye BD, Byeon JS, and Myung SJ were involved in study patient enrollment, data collection, and data analysis; Yang SK was involved in study design, supervision, and critical revision of the study; all authors read and approved the final version of the manuscript.
Institutional review board statement: The study was reviewed and approved by the Institutional Review Board of Asan Medical Center, No. 2020-0814.
Informed consent statement: The requirement for informed consent was waived by the Institutional Review Board considering the retrospective design of the study.
Conflict-of-interest statement: All authors have no conflict of interest related to the study.
Data sharing statement: No additional data are available.
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.
: 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: http://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Suk-Kyun Yang, PhD, Professor, Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, South Korea. firstname.lastname@example.org
Received: February 5, 2021
Peer-review started: February 5, 2021
First decision: February 27, 2021
Revised: March 5, 2021
Accepted: April 25, 2021
Article in press: April 25, 2021
Published online: May 21, 2021