Characteristics and Risk Factors of Upper Gastrointestinal Bleeding in Patients on Antithrombotic Therapy: A Prospective Study

Abstract

Study aims: Evaluate the effect of antithrombotic therapy use on endoscopic outcomes in patients admitted for upper gastrointestinal bleeding. Patients and Methods: This is a prospective monocentric cross-sectional study of 332 patients conducted between June2020 and August 2021.We considered as users of AT drugs all patients on antiplatelet agents (low-dose aspirin, thienopyrimidines) and/or anticoagulants (vitamin K antagonists, direct-acting anticoagulants, heparin). Results: The average age was 59+/−16.7 years. Our series was characterised by a clear male predominance of 77.1%.63 patients (19%) were taking AT drugs (41 antiplatelet, 39 anticoagulant). The two groups differed in age (68 vs 57; p<0.001), comorbidities (75.8% vs 16.7%; p<0.001), however there was no statistically significant difference in active bleeding at endoscopy (12.7%vs 16.8%; p=0.425), and the need for endoscopic haemostasis (7.9%vs 16%; p=0.1).In multivariate analysis and adjusting for age, sex, comorbidities, presence of active bleeding and use of antithrombotics, only the presence of active bleeding could predict the need for endoscopic haemostasis. Indeed, the presence of active bleeding at the time of endoscopy multiplies by 26 the risk of recourse to endoscopic haemostasis (OR: 26, CI: 12.9–62.15, p<0.001), whereas the use of AT drugs does not influence the need for endoscopic haemostasis (OR: 0.386, CI: 0.105- 1.42, p=0.154). Conclusions: Older patients using AT admitted for UGIB do not appear to have an increased risk of active bleeding at endoscopy or needing endoscopic haemostasis.