RT Journal Article T1 Chronic Oral Anticoagulation Therapy and Prognosis of Patients Admitted to Hospital for COVID-19: Insights from the HOPE COVID-19 Registry. A1 Rivera-Caravaca, José Miguel A1 Núñez-Gil, Iván J A1 Lip, Gregory Y H A1 Uribarri, Aitor A1 Viana-Llamas, María C A1 Gonzalez, Adelina A1 Castro-Mejía, Alex F A1 Alonso González, Berta A1 Alfonso, Emilio A1 García Prieto, Juan Fortunato A1 Cavallino, Chiara A1 Cortese, Bernardo A1 Feltes, Gisela A1 Fernández-Rozas, Inmaculada A1 Signes-Costa, Jaime A1 Huang, Jia A1 García Aguado, Marcos A1 Pepe, Martino A1 Romero, Rodolfo A1 Cerrato, Enrico A1 Becerra-Muñoz, Víctor Manuel A1 Raposeiras Roubin, Sergio A1 Santoro, Francesco A1 Bagur, Rodrigo A1 Sposato, Luciano A1 El-Battrawy, Ibrahim A1 López Masjuan, Alvaro A1 Fernandez-Ortiz, Antonio A1 Estrada, Vicente A1 Macaya, Carlos A1 Marín, Francisco AB Most evidence regarding anticoagulation and COVID-19 refers to the hospitalization setting, but the role of oral anticoagulation (OAC) before hospital admission has not been well explored. We compared clinical outcomes and short-term prognosis between patients with and without prior OAC therapy who were hospitalized for COVID-19. Analysis of the whole cohort of the HOPE COVID-19 Registry which included patients discharged (deceased or alive) after hospital admission for COVID-19 in 9 countries. All-cause mortality was the primary endpoint. Study outcomes were compared after adjusting variables using propensity score matching (PSM) analyses. 7698 patients were suitable for the present analysis (675 (8.8%) on OAC at admission: 427 (5.6%) on VKAs and 248 (3.2%) on DOACs). After PSM, 1276 patients were analyzed (638 with OAC; 638 without OAC), without significant differences regarding the risk of thromboembolic events (OR 1.11, 95% CI 0.59-2.08). The risk of clinically relevant bleeding (OR 3.04, 95% CI 1.92-4.83), as well as the risk of mortality (HR 1.22, 95% CI 1.01-1.47; log-rank p value = 0.041), was significantly increased in previous OAC users. Amongst patients on prior OAC only, there were no differences in the risk of clinically relevant bleeding, thromboembolic events, or mortality when comparing previous VKA or DOAC users, after PSM. Hospitalized COVID-19 patients on prior OAC therapy had a higher risk of mortality and worse clinical outcomes compared to patients without prior OAC therapy, even after adjusting for comorbidities using a PSM. There were no differences in clinical outcomes in patients previously taking VKAs or DOACs. This trial is registered with NCT04334291/EUPAS34399. YR 2022 FD 2022-05-26 LK http://hdl.handle.net/10668/20179 UL http://hdl.handle.net/10668/20179 LA en DS RISalud RD Apr 19, 2025