Rituximab maintenance improves overall survival of patients with follicular lymphoma—Individual patient data meta-analysis

Liat Vidal, Anat Gafter-Gvili, Gilles Salles, Sami Bousseta, Bernice Oberman, Carmit Rubin, Marinus H J van Oers, Catherine Fortpied, Michele Ghielmini, Ruth Pettengell, Mathias Witzens-Harig, Peter Dreger, Umberto Vitolo, Maria Gomes da Silva, Andrea Evangelista, Hailun Li, Laurence Freedman, Thomas Matthew Habermann, Ofer Shpilberg

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Background Randomised trials of rituximab maintenance (MR) for patients with follicular lymphoma support improved progression-free survival (PFS), but the effect on overall survival has been inconclusive. To evaluate the effect of MR on overall survival according to patient and disease characteristics, and to explore certain adverse events, we performed an individual patient data (IPD) meta-analysis. Methods All investigators of randomised controlled trials that compared MR therapy with observation or treatment only at relapse (no MR) for patients with follicular lymphoma were invited to participate in an IPD meta-analysis. We obtained baseline patient and disease characteristics and time to progression and death for each patient. All analyses took into account the trial and original randomised treatment group. We analysed data in two ways: a two-stage analysis and a multivariate model including patient and disease characteristics. Findings Seven trials including 2315 patients were analysed. Overall survival of patients improved with MR compared with no MR (hazard ratio [HR] 0.79, 95% CI 0.66–0.96). We could not detect any patient or disease characteristics that were associated with a survival benefit with MR. In all of the models, MR had a beneficial effect on overall survival compared with observation for all types of patients, which was not shown in a particular subgroup in which the patient had already received rituximab in the induction phase and received first-line therapy. MR improved PFS compared with observation (HR 0.57, 95% CI 0.51–0.64). The risk of adverse events was higher with MR, specifically infection of any grade and grade 3–4 infections. Interpretation Based on IPD from randomised controlled trials, MR improves overall survival consistently in all patients, regardless of patient and disease characteristics when compared with observation, and should be prescribed after a successful induction with R-CVP or R-CHOP for patients with follicular lymphoma. It is still uncertain if that holds when the patient has already received rituximab in his/hers first induction. The effect of MR after bendamustine-rituximab induction compared with rituximab at progression should be further explored.

Original languageEnglish (US)
Pages (from-to)216-225
Number of pages10
JournalEuropean Journal of Cancer
Volume76
DOIs
StatePublished - May 1 2017

Keywords

  • Follicular lymphoma
  • Maintenance
  • Meta-analysis
  • Rituximab

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Fingerprint Dive into the research topics of 'Rituximab maintenance improves overall survival of patients with follicular lymphoma—Individual patient data meta-analysis'. Together they form a unique fingerprint.

  • Cite this

    Vidal, L., Gafter-Gvili, A., Salles, G., Bousseta, S., Oberman, B., Rubin, C., van Oers, M. H. J., Fortpied, C., Ghielmini, M., Pettengell, R., Witzens-Harig, M., Dreger, P., Vitolo, U., Gomes da Silva, M., Evangelista, A., Li, H., Freedman, L., Habermann, T. M., & Shpilberg, O. (2017). Rituximab maintenance improves overall survival of patients with follicular lymphoma—Individual patient data meta-analysis. European Journal of Cancer, 76, 216-225. https://doi.org/10.1016/j.ejca.2017.01.021