Abstract Background: Low functional health literacy in anticoagulated patients using warfarin has been widely discussed in medical literature. Objective: To identify the quality of oral anticoagulation (QOA) over time and to analyze the association between this variable and functional health literacy. Methods: Prospective cohort study conducted at an anticoagulation clinic (AC) in Minas Gerais, in a high-complexity hospital. The study included 81 patients, whose data were collected by direct consultation of medical records or by asking questions while patients were […]