Significant risk factors for thrombosis in 891 patients with WHO-defined ET and associated prognostic scores
| Risk factor . | HR . | Score . |
|---|---|---|
| Age > 60 y | 1.50 | 1 |
| Cardiovascular risk factors | 1.56 | 1 |
| Previous thrombosis | 1.93 | 2 |
| JAK2V617F | 2.04 | 2 |
| Risk factor . | HR . | Score . |
|---|---|---|
| Age > 60 y | 1.50 | 1 |
| Cardiovascular risk factors | 1.56 | 1 |
| Previous thrombosis | 1.93 | 2 |
| JAK2V617F | 2.04 | 2 |
Low risk implies a score = 0-1; intermediate risk, score = 2; and high risk, score ≥ 3.
WHO indicates World Health Organization.