International Prognostic Score for ET
Patient age less than 60 (0 points)
Older than 60 (1 point)

Prior thrombotic event
No: (0 points). Yes: (2 points)

Cardio vascular risks factors
No: (0 points). Yes: ( 1 point)

JAK2 V617 mutation detected
No: (0 points). Yes: (2 points)

Low risk is 0-1
Intermediate is 2
high is 3-6

Eileen