Abstract: The long-term risk for major bleeding in patients receiving extended (beyond the initial 3 to 6 months) anticoagulant therapy for a first unprovoked venous thromboembolism (VTE) is uncertain.To determine the incidence of major bleeding during extended anticoagulation of up to 5 years among patients with a first unprovoked VTE, overall, and in clinically important subgroups.MEDLINE, Embase, and the Cochrane Central Register of Controlled Trials from inception to 23 July 2021.Randomized controlled trials (RCTs) and prospective cohort studies repo...
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