IPSS
International Prognostic Scoring System (IPSS) for myelodysplasia    
          1. Sum the scores for each factor (marrow blast %, cytogenetics and cytopenias)
Value Points
Score Blasts (%) Karyotype Cytopenias
Blasts (%)
0,0 < 5 Good 0 or 1
Karyotype
0,5 5-10 Intermediate 2 or 3
Cytopenias
1,0 - Poor
1,5 11-20
2,0 21-30
          2. Use summed scores to determine risk category and prognosis
SUM of SCORE     Score Risk category Median OS (years) Median leukemia-free survival (years)
RISK CATEGORY     0 Low 5,70 5,70
0.5 - 1.0 Intermediate-1 3,50 2,70
1.5 - 2.0 Intermediate-2 1,20 0,95
≥ 2.5 High 0,40 0,30
Reference                
Greenberg P, Cox C, LeBeau MM, Fenaux P, Morel P, Sanz G et al. International scoring system for evaluating prognosis in myelodysplastic syndromes. Blood 1997; 89: 2079-2088.