International Prognostic Index

**Semantic type:** Intellectual Product

**Definition:** A list of five factors that help doctors assess how a non-Hodgkin lymphoma patient might respond to a certain treatment or predict the risk of disease recurrence and survival following therapy. The factors are: 1) patient's age, 2) stage of disease: an indication of how localized or widespread is the disease, 3) LDH levels: serum levels often correlate with the amount of tumor in the body, 4) the number of extranodal, non-lymphatic sites found, 5) the patient's overall health. (from Lymphoma Research Foundation of America glossary (www.lymphoma.org))

**Synonyms:** - IPI - international prognostic index - international_prognostic_index