Table 1.

Adapted from [9] showing incorporation of molecular risk factors and median overall survival (OS) for respective risk groups; Int, Intermediate.

Scoring System	Criteria	Low Risk	Int Risk	High Risk
MIPSS-PV	Age > 67 years (2 points) Leukocyte count ≥15 × 109/L (1 point) Adverse Mutation—SRSF2 (3 points) Thrombosis history (1 point)	0–1 point Median OS 24 years	2–3 points Median OS 13.1 years	≥4 points Median OS 3.2 years
MIPSS-ET	Age > 60 years (4 points) Male gender (1 point) Leukocyte count ≥11 × 109/L (1 point) Adverse Mutations—SRSF2, SF3B1, U2AF1, TP53 (2 points)	0–1 point Median OS 34.4 years	2–5 points Median OS 14.1 years	≥6 points Median OS 7.9 years