International Prognostic Scoring in essential thrombocythemia for survival in WHO-ET
| Risk factors . | Scores . | ||
|---|---|---|---|
| 0 . | 1 . | 2 . | |
| Age, y | < 60 | ≥ 60 | |
| WBC count, × 109/L | < 11 | ≥ 11 | |
| History of thrombosis | No | Yes | |
| Risk factors . | Scores . | ||
|---|---|---|---|
| 0 . | 1 . | 2 . | |
| Age, y | < 60 | ≥ 60 | |
| WBC count, × 109/L | < 11 | ≥ 11 | |
| History of thrombosis | No | Yes | |
Low risk implies a sum of scores equal to 0; intermediate risk, a sum of scores equal to 1-2; and high risk, a sum of scores equal to 3-4.
ET indicates essential thrombocythemia; and WBC, white blood cell count.