Table 1.

International prognostic scoring system for myelodysplastic syndromes: survival and evolution of acute myeloid leukemia

	Score value
Prognostic variable	0	0.5	1.0	1.5	2.0
Bone marrow blasts, %	<5	5–10	–	11–20	21–30
Karyotypea	Good	Intermediate	Poor
Cytopeniasb	0/1	2/3

Scores for risk groups are as follows: Low, 0; Int-1, 0.5–1.0; Int-2, 1.5–2.0; and High, ≥2.5

^aGood: normal, −Y, isolated del(5q), isolated del(20q); poor: ≥3 abnormalities or chromosome 7 anomalies; intermediate: other abnormalities

^bNeutrophils <1800 × 10⁶/l, hemoglobin <10 g/dl, platelets <100 × 10⁹/l

Table reproduced with permission from [3] © The American Society of Hematology