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Risk of recurrent venous thromboembolism according to baseline risk factor profiles
Martin H Prins1, Anthonie W A Lensing2, Paolo Prandoni3
1Department of Epidemiology and Technology Assessment, University of Maastricht, Maastricht, The Netherlands.
Blood Advances
|April 11, 2018
Summary
Extended anticoagulation may benefit patients with provoked venous thromboembolism (VTE). Recurrence rates were similar for unprovoked VTE and VTE provoked by minor risk factors, suggesting longer treatment is beneficial.
Area of Science:
- Cardiology
- Hematology
- Pharmacology
Background:
- The optimal duration of anticoagulation for venous thromboembolism (VTE) remains uncertain.
- Risk stratification is crucial for guiding extended VTE treatment decisions.
Purpose of the Study:
- To estimate the risk of VTE recurrence based on baseline risk factor profiles.
- To compare extended VTE treatment with rivaroxaban, aspirin, or placebo.
Main Methods:
- Analysis of data from 2 randomized trials involving 2832 patients on rivaroxaban, 1131 on aspirin, and 590 on placebo.
- Central classification of index VTE events as unprovoked or provoked by various risk factors.
- Calculation of 1-year recurrence rates for each treatment group and risk factor profile.
Main Results:
- For unprovoked VTE, 1-year recurrence rates were 2.0% (rivaroxaban), 5.9% (aspirin), and 10.0% (placebo).
- For VTE provoked by minor persistent risk factors, rates were 2.4% (rivaroxaban), 4.5% (aspirin), and 10.7% (placebo).
- For VTE provoked by minor transient risk factors, rates were 0.4% (rivaroxaban), 4.2% (aspirin), and 7.1% (placebo).
Conclusions:
- Recurrence rates for VTE provoked by minor persistent or transient risk factors were not significantly different from unprovoked VTE.
- Patients with VTE provoked by minor risk factors may benefit from extended anticoagulation therapy.
- These findings support individualized extended anticoagulation strategies for VTE management.
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