AIM:To classify changes over time in causes of lower gastrointestinal bleeding (LGIB) and to identify factors associated with changes in the incidence and characteristics of diverticular hemorrhage (DH).
METHODS:A total of 1803 patients underwent colonoscopy for overt LGIB at our hospital from 1995 to 2013. Patients were divided into an early group (EG, 1995(EG, -2006 n = 828) and a late group (LG, 2007(LG, -2013 Author contributions: Kinjo K collected and analyzed the data, and drafted the manuscript; Matsui T designed and supervised the study; Washio M performed the statistical analysisl; Hisabe T, Ishihara H, Maki S, Chuman K, Koga A, Ohtsu K, Takatsu N, Hirai F and Yao K performed the colonoscopy and revised the manuscript for important intellectual content; all authors have read and approved the final version to be published.Institutional review board statement: This study was approved by the institutional review board of Fukuoka University Chikushi Hospital (R15-024) and was conducted in accordance with the Declaration of Helsinki.Informed consent statement: In this study, We do not necessarily need the individual agreement from a study subject. Because this study is retrospective study and based on the ethical guidelines for medical studies intended for people "taken from the human body undergoes No. 12 informed consent procedures was used samples not research". Information about the implementation of this research exposes to Fukuoka University Chikushi Hospital clinical research support Center home page.
Conflict-of-interest statement:In connection with this manuscript, there is no Conflict of Interest to be disclosed with any companies.Data sharing statement: Technical appendix, statistical code, and dataset available from the corresponding author at matsui@ fukuoka-u.ac.jp. Participants gave informed consent was not obtained but the presented data are anonymized and risk of identification is low.
Retrospective Studybetween patients with and without DH.
RESULTS:Older patients (≥ 70 years old) and those with colonic DH were more frequent in LG than in EG (P < 0.01). Patients using ATDs as well as NSAIDs, male sex, obesity (body mass index ≥ 25 kg/m 2 ), smoking, alcohol drinking, and arteriosclerotic diseases were more frequent in patients with DH than in those without.
CONCLUSION:Incidence of colonic DH seems to increase with aging of the population, and factors involved include use of ATDs and NSAIDs, male sex, obesity, smoking, alcohol drinking, and arteriosclerotic disease. These factors are of value in handling DH patients. Core tip: Colonic diverticular hemorrhage (DH) is the most frequent cause of lower gastrointestinal bleeding. A rapid increase in the incidence of colonic DH has been seen with the aging population. One reason is the widespread adoption of antithrombotic drugs (ATDs) since the early 2000s, based on guidelines to prevent ischemic heart disease and ischemic cerebrovascular disease. DH is more likely in patients who are older, are men, obesity, use nonsteroidal anti-inf...