Risk stratification in polycythemia vera (PV) and essential thrombocythemia based on thrombotic risk.*
| Risk Category . | Age > 60 years or History of Thrombosis . | Cardiovascular Risk Factors . |
|---|---|---|
| *Cardiovascular risk factors include hypertension, hypercholesterolemia, diabetes, smoking, and congestive heart failure. Extreme thrombocytosis (platelet count > 1500 × 109/L) is a risk factor for bleeding. Its role as a risk factor for thrombosis in PV is uncertain. | ||
| Low | no | no |
| Intermediate | no | yes |
| High | yes | |
| Risk Category . | Age > 60 years or History of Thrombosis . | Cardiovascular Risk Factors . |
|---|---|---|
| *Cardiovascular risk factors include hypertension, hypercholesterolemia, diabetes, smoking, and congestive heart failure. Extreme thrombocytosis (platelet count > 1500 × 109/L) is a risk factor for bleeding. Its role as a risk factor for thrombosis in PV is uncertain. | ||
| Low | no | no |
| Intermediate | no | yes |
| High | yes | |