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To predict the prognostic factors and to improve the response and survival in intermediate-grade and high-grade non-Hodgkin lymphoma (NHL).
200 patients with intermediate-grade and high-grade NHL were treated with chemotherapy. A multivariate Cox model was used to analyse the prognostic factors that significantly affect the treatment outcome. The variables examined included: sex, age, clinic stage of disease, B symptoms, extranodal sites, bone marrow involvement, tumor bulk, performance status (ECOG) and malignancy grades.
Multivariate analysis showed that performance status, the number of extranodal sites, pathologic malignancy grade and tumor bulk were significantly independent prognostic factors. These factors were put together to construct a prognostic index formula. The index partitioned the patients into low risk group (PI -2.43(-)-1.30), intermediate risk group (PI -1.29-1.0) and high risk group (PI > 1.0) giving 5-year survival rates of 76.0%, 21.6% and 7.4%, respectively.
The prognostic index formula