RT Journal Article T1 Effect of previous anticoagulant treatment on risk of COVID-19 A1 Zapata Cachafeiro, Maruxa A1 Prieto Campo, Ángela A1 Portela Romero, Manuel A1 Carracedo Martínez, Eduardo A1 Lema Oreiro, Martina A1 Piñeiro Lamas, María A1 Chaudhuri, Somnath A1 Salgado Barreira, Ángel A1 Figueiras Guzmán, Adolfo AB Introduction: Little is known about the role played by anticoagulants in COVID-19. Objective: The aim of this study was to assess the impact of previous anticoagulant treatment on risk of hospitalization due to COVID-19, progression to severe COVID-19 and susceptibility to COVID-19 infection. Methods: We conducted a multiple population-based case–control study in northwest Spain, in 2020, to assess (1) risk of hospitalization: cases were all patients admitted due to COVID-19 with PCR confirmation, and controls were a random matched sample of subjects without a positive PCR; (2) progression: cases were hospitalized COVID-19 subjects, and controls were all non-hospitalized COVID-19 patients; and (3) susceptibility: cases were patients with a positive PCR (hospitalized and non-hospitalized), and the controls were the same as for the hospitalization model. Adjusted odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated using a generalized linear mixed model PB Springer SN 0114-5916 YR 2022 FD 2022 LK http://hdl.handle.net/10347/29998 UL http://hdl.handle.net/10347/29998 LA eng NO Zapata-Cachafeiro, M., Prieto-Campo, Á., Portela-Romero, M. et al. Effect of Previous Anticoagulant Treatment on Risk of COVID-19. Drug Saf (2022). https://doi.org/10.1007/s40264-022-01266-0 DS Minerva RD 28 abr 2026