In a population of patients with venous thromboembolism and treated with oral anticoagulants (OAC) in routine clinical practice in Denmark this study will describe patients treated with each OAC

Inclusion Criteria:

1. All patients ≥ 18 years diagnosed with incident VTE at Danish public hospitals from 2006 through 2015
2. First-time (index) VTE will be defined as an in- or out-patient diagnosis of DVT or PE among patients redeeming a prescription for anticoagulant drugs within 30 days after index date

Exclusion Criteria:

1. In the analyses on type and duration of anticoagulant use, Patients with cancer will be excluded as they typically receive low molecular heparin directly from the hospital and their use of anticoagulants can therefore not be captured by redeemed prescriptions at pharmacies.

The Danish National Patient Registry (DNPR), covering all Danish hospitals, will be used to identify first-time and recurrent VTE cases diagnosed from 01-Jan-2006 through 31-Dec-2015.