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| IPSET (International Prognostic Score for ET: predicts survival) | |
| Risk factors (weight): | Risk and Survival |
| Age ≥60 y (2 points) | Low risk: 0 (median survival not reached) |
| Previous thrombosis (1 point) | Intermediate risk: 1-2 points (median survival, 24.5 y) |
| Leukocyte count >11 × 109/L (1 point) | High risk: 3-4 points (median survival, 13.8 y) |
Reference
Passamonti F, Thiele J, Girodon F, et al. . A prognostic model to predict survival in 867 World Health Organization-defined essential thrombocythemia at diagnosis: a study by the International Working Group on Myelofibrosis Research and Treatment. Blood. 2012;120(6):1197-1201.