IPI
International Prognostic Index (IPI)     Prognostic scoring system for aggressive non-Hodgkin lymphoma
          1. Sum the number of risk factors        
Value Points
Risk factors
Age (years)
Age > 60 years
LDH Raised (Yes-No)
Raised LDH: YES=1  NO=0
Performance status
Performance status ≥ 2
Ann Arbor stage
Ann Arbor stage ≥ 3
extranodal sites of disease (number)
Two or more extranodal sites of disease
          2. Determine risk category and prognosis      
          Risk factors (n) Risk category DLBCL 3yr OS2 PTCL 5yr OS3    
0 - 1 Low 91% 50%
Sum of score       2 Low-inter­mediate 81% 33%    
Risk category       3 High-inter­mediate 65% 16%    
4 - 5 High 59% 11%
References
A predictive model for aggressive non-Hodgkin’s lymphoma. The International Non-Hodgkin’s Lymphoma Prognostic Factors Project. New Engl J Med 1993; 329: 987-994.