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Antithrombotic prophylaxis and oral anticoagulation (OAC) in patients with various eligibility categories for OAC by CHADS2 or CHA2DS2-VASc. Score 0 (=no risk factor) = no OAC recommended; Score 1 (=only 1 non-major risk factor) = either ASS or OAC recommended, OAC preferred; Score ≥2 (=at least 1 major or at least 2 non-major risk factors) = OAC recommended. Information on antithrombotic prophylaxis and oral anticoagulation was missing in 409 patients
