Calculation Formulas of Scoring System: The Sokal, Hasford, EUTOS and ELTS Scores

Calculation Formulas of Scoring System of survival in chronic myeloid leukemia (CML): The Sokal, Hasford, EUTOS and ELTS Scores.

Sokal scoreExp 0.01 16 x (age – 43.4) + 0.0345 x (spleen – 7.51) + 0.1880 x [(platelet count/700)2-0.563] + 0.0887 x (blasts -2.10)Low risk: <0.8
Intermediate risk: 0.8-1.2
High risk: >1.2
Hasford score(0.6666 x age [0 when age <50 years; 1, otherwise] + 0.0420 x spleen + 0.0584 x blasts + 0.0413 x eosinophils + 0.2039 x basophils [0 when basophils <3%; 1, otherwise] + 1.0956 x platelet count [0 when platelets <1500 x I09/L; 1, otherwise]) x 1000Low risk: ≤780
Intermediate risk: 781-1480
High risk: >1480
EUTOS score(Basophils x 7) + (spleen x 4)Low risk: ≤87
High risk: >87
ELTS score0.0025 x (age/10)3 + 0.0615 x spleen + 0.1052 x blasts + 0.4104 x (platelet count/1000)-05Low risk: ≤1.5680
Intermediate risk: 1.5680-2.2185
High risk: >2.2185

Note: Exp – exponential function; Age is in years; Spleen is in cm below the costal margin; Platelet count is in * I09/L; Blasts, eosinophils and basophils are in percent of peripheral blood.
EUTOS, European Treatment and Outcome Study; ELTS, EUTOS long-term survival.

A source:
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.
Thomas M, Irving J, Lennard A, Proctor S, Taylor P. Validation of the Hasford score in a demographic study in chronic granulocytic leukaemia. Journal of Clinical Pathology. 2001;54(6):491-493. doi:10.1136/jcp.54.6.491.
Uz B, Buyukasik Y, Atay H, et al. EUTOS CML prognostic scoring system predicts ELN-based ‘event-free survival’ better than Euro/Hasford and Sokal systems in CML patients receiving front-line imatinib mesylate. Hematology. 2013;18(5):247-52.
Yahng SA, Jang EJ, Choi SY, et al. Comparison of Sokal, Hasford and EUTOS scores in terms of long-term treatment outcome according to the risks in each prognostic model: a single center data analyzed in 255 early chronic phase chronic myeloid leukemia patients treated with frontline imatinib mesylate. Blood 2012;120:Abstract 2794.
Marin D, Ibrahim AR, Goldman JM. European Treatment and Outcome Study (EUTOS) score for chronic myeloid leukemia still requires more confirmation. J Clin Oncol 2011;29:3944–5.
Yamamoto E, Fujisawa S, Hagihara M, et al. European Treatment and Outcome Study score does not predict imatinib treatment response and outcome in chronic myeloid leukemia patients. Cancer Sci. 2014;105(1):105-9.
Pfirrmann M, Baccarani M, Saussele S, et al. Prognosis of long-term survival considering disease-specific death in patients with chronic myeloid leukemia. Leukemia. 2016;30(1):48-56. 
Validation of the EUTOS Long-Term Survival Score in Chinese Chronic Myeloid Leukemia Patients Treated with Imatinib: A Multicenter Real-World Study DOI:10.2147/CMAR.S237467
Pfirrmann M, Baccarani M, Saussele S, Guilhot J, Cervantes F, Ossenkoppele G, Hoffmann V S, Castagnetti F, Hasford J, Hehlmann R, Simonsson B. Prognosis of long-term survival considering disease-specific death in patients with chronic myeloid leukemia. Leukemia 2015. Article in press.
Hasford J, Pfirrmann M, Hehlmann R, Allan NC, Baccarani M, Kluin-Nelemans JC et al. A new prognostic score for survival of patients with chronic myeloid leukemia treated with interferon alfa. J Natl Cancer Inst. 1998; 90: 850-8.

Read also:

Register on our website right now to have access to more learning materials!

Alzheimer disease, Alzheimer, manifestations of Alzheimer's disease, diagnosis of Alzheimer's disease, what is Alzheimer disease, features of Alzheimer's disease, pathology of Alzheimer disease, Alzheimer disease in Down syndrome, treatment of Alzheimer disease, Clinical presentation of Alzheimer disease, dementia, dementia diagnosis, Vascular dementia, Frontotemporal dementia, Pick disease, Creutzfeldt-Jakob disease, Huntington disease

Clinical Presentation Alzheimer Disease

Learning Objectives: 1. Discuss the differential diagnoses of dementia 2. Identify the clinical manifestations of Alzheimer disease 3. Discuss the diagnosis of Alzheimer disease 4. Describe the …
Read More

Related Articles