VTE recurrence risk stratification
| High risk . | Moderate risk . | Low risk . |
|---|---|---|
| VTE within past 3 mo | VTE within past 3-12 mo | VTE > 12 mo previously No other risk factors |
| Deficiency of protein C, protein S, or antithrombin | Heterozygous factor V Leiden | |
| Antiphospholipid antibody syndrome | Prothrombin 20210 mutation | |
| Multiple thrombophilic abnormalities | Recurrent VTE | |
| Active cancer |
| High risk . | Moderate risk . | Low risk . |
|---|---|---|
| VTE within past 3 mo | VTE within past 3-12 mo | VTE > 12 mo previously No other risk factors |
| Deficiency of protein C, protein S, or antithrombin | Heterozygous factor V Leiden | |
| Antiphospholipid antibody syndrome | Prothrombin 20210 mutation | |
| Multiple thrombophilic abnormalities | Recurrent VTE | |
| Active cancer |