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. 2014 Jan 23;105(1):105–109. doi: 10.1111/cas.12321

Table 1.

Calculation form of each scoring system for the Sokal, Hasford and EUTOS scores

Scoring system Calculation Risk definition
Sokal score5 Exp 0.0116 × (age − 43.4) + 0.0345 × (spleen − 7.51) + 0.188 × [(platelet count ÷ 700)2 − 0.563] + 0.0887 × (blast cells − 2.10) Low risk: <0.8
Intermediate risk: 0.8–1.2
High risk: >1.2
Hasford score6 0.666 when age ≥50 years + (0.042 × spleen) + 1.0956 when platelet count >1500 × 109/L + (0.0584 × blast cells) + 0.20399 when basophils >3% + (0.0413 × eosinophils) × 100 Low risk: ≤780
Intermediate risk: 781–1480
High risk: >1480
EUTOS score7 (Basophils × 7) + (spleen × 4) Low risk: ≤87
High risk: >87

Age is in years. Spleen is in cm below the costal margin. Blast cells, eosinophils and basophils are in percent of peripheral blood differential. EUTOS, European Treatment and Outcome Study; Exp, exponential function.