Peripheral blood lymphocyte/monocyte ratio predicts outcome for patients with diffuse large B cell lymphoma after standard first-line regimens

Yan-Li Li, Yue-Yin Pan, Yang Jiao, Jie Ning, Yin-Guang Fan, Zhi-Min Zhai
Annals of Hematology 2014, 93 (4): 617-26
To determine whether peripheral blood absolute lymphocyte/absolute monocyte counts ratio (ALC/AMC ratio) at diagnosis predicts survival of diffuse large B cell lymphoma (DLBCL) patients treated with standard first-line regimens, we retrospectively analyzed 244 patients with DLBCL who were treated with standard cyclophosphamide, hydroxydaunorubicin, vincristine, and prednisone, or rituximab-cyclophosphamide, hydroxydaunorubicin, vincristine, and prednisone. Progression-free survival and overall survival (PFS and OS) were estimated using the Kaplan-Meier method and two-tailed log-rank; The Cox proportional hazards model was used to evaluate ALC/AMC ratio as prognostic factors when adjusting for the International Prognostic Index (IPI). On univariate and multivariate analyses performed with factors included in the IPI, the ALC/AMC ratio at diagnosis remained an independent predictor of OS and PFS (OS: P < 0.001; PFS: P < 0.001). Patients with lower ALC/AMC ratio (<3.8) seemed to have lower complete remission rate, 2-year PFS and 3-year OS when compared to patients with ALC/AMC ratio ≥3.8, respectively (26 versus 90 %, P < 0.001; 18 versus 82 %, P < 0.001; 24 versus 86 %; P < 0.001, respectively). Moreover, the ALC/AMC ratio was able to further risk-stratify IPI 0-2 and three-five risk patient groups, respectively. The ALC/AMC ratio at the time of diagnosis may provide additional prognostic information beyond that of the IPI for patients with DLBCL who receive standard first-line regimens.

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