ENGLISH ABSTRACT
JOURNAL ARTICLE
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[Prognostic factors analysis for R-CHOP regimen therapy in diffuse large B cell lymphoma].

OBJECTIVE: To reassess the prognostic factors of diffuse large B cell lymphoma (DLBCL) treated with R-CHOP therapy.

METHODS: One hundred and twenty five patients were enrolled in this study from Feb. 2000 to Sep. 2006. They received 6 courses of R-CHOP regimen consisting of rituximab 375 mg/ m2, intravenously, d 1; cyclophosphamide 750 mg/m2, bolus intravenously, d 2; doxorubicin 50 mg/m2, bolus intravenously, d 2; vincristine 1.4 mg/m2, bolus intravenously, d 2 and prednisone 60 mg, orally, d 2 - 6. All the patients were evaluated and followed up after the treatment.

RESULTS: Eighty six patients (68.8%) achieved complete response (CR), 16 (12.8%) partial response (PR), 11 (12.8%) stable disease (SD) and 12 (9.6%) progressive disease (PD). In univariate analysis, performance status (PS), clinical stage, LDH level, extranodal disease, international prognostic index (IPI) and bulky disease were statistically significantly correlated with the induction of CR; however, only PS, clinical stage and bulky disease remained significant in multi-variate analysis (P = 0.0098, 0.000 and 0.004, respectively). Twenty four month for time to treatment failure (TTF) rate, overall survival (OS) rate, and disease free survival (DFS) rate was (59.7 +/- 5. 3)%, (67.1 +/- 5.6)% and (77.6 +/- 5.8)%, respectively. In univariate analysis, LDH, clinical stage and PS exerted significant effect on TTF and OS rate, but not on DFS rate; age and extranodal disease was not related with TTF, OS and DFS rate. In multi-variate analysis, achieved CR was the only prognostic factor for TTF (P =0.001) and bulky disease had influence on DFS rate. LDH level, PS, and achieved CR was correlated with the OS rate in multi-variate setting (P = 0.002, 0.009 and 0.001 respectively).

CONCLUSION: IPI score has its limitation in predicting the prognosis in the R-CHOP era in DLBCL. Other two relevant prognostic factors are bulky disease and achieved CR after 6 courses of treatment.

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