SOKAL
Sokal Score Calculator                    
                     
  Value     1. Sum the number of risk factors present
Age (years)*     exp (0.0116 x (age [years] – 43.4)) + (0.0345 x (spleen size [cm] – 7.51) + (0.188 x ((platelets [109/L]/700)^2 – 0.563)) + (0.0887 x (blasts [%] – 2.10))
Spleen size (cm below costal margin)*                
Platelet count (x 109/L)*                
Peripheral blood blasts (% of leukocytes)*                
          2. Determine risk category and prognosis          
SOKAL score     low-risk (Sokal score < 0.8)          
          Intermediate-risk (Sokal score 0.8 - 1.2)          
SOKAL risk group     high-risk (> 1.2)          
Reference                    
Sokal JE, Cox EB, Baccarani M, Tura S, Gomez GA, Robertson JE et al. Prognostic discrimination in “good-risk” chronic granulocytic leukemia. Blood 1984; 63: 789-99.