Originally published as JCO Early Release 10.1200/JCO.2004.03.012 on August 2 2004

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Individual Patient Data–Based Meta-Analysis of Patients Aged 16 to 60 Years With Core Binding Factor Acute Myeloid Leukemia: A Survey of the German Acute Myeloid Leukemia Intergroup

From the Department of Internal Medicine III, University of Ulm, Ulm; Central Unit of Biostatistics, German Cancer Research Center Heidelberg, Heidelberg; Department of Hematology/Oncology, University of Hannover, Hannover; Department of Internal Medicine A and Department of Medical Informatics and Bioinformatics, University of Münster, Münster; Department of Internal Medicine I, University of Dresden, Dresden; Department of Hematology/Oncology, University of Leipzig, Leipzig; and Ernst von Bergmann Klinik, Potsdam, Germany

Address reprint requests to Hartmut Döhner, MD, Department of Internal Medicine III, University of Ulm, Robert-Koch-Strasse 8, 89081 Ulm, Germany; e-mail: hartmut.doehner{at}medizin.uni-ulm.de

PURPOSE: To evaluate prognostic factors for relapse-free survival (RFS) and overall survival (OS) and to assess the impact of different postremission therapies in adult patients with core binding factor (CBF) acute myeloid leukemias (AML).

PATIENTS AND METHODS: Individual patient data–based meta-analysis was performed on 392 adults (median age, 42 years; range, 16 to 60 years) with CBF AML (t(8;21), n = 191; inv(16), n = 201) treated between 1993 and 2002 in prospective German AML treatment trials.

RESULTS: RFS was 60% and 58% and OS was 65% and 74% in the t(8;21) and inv(16) groups after 3 years, respectively. For postremission therapy, intention-to-treat analysis revealed no difference between intensive chemotherapy and autologous transplantation in the t(8;21) group and between chemotherapy, autologous, and allogeneic transplantation in the inv(16) group. In the t(8;21) group, significant prognostic variables for longer RFS and OS were lower WBC and higher platelet counts; loss of the Y chromosome in male patients was prognostic for shorter OS. In the inv(16) group, trisomy 22 was a significant prognostic variable for longer RFS. For patients who experienced relapse, second complete remission rate was significantly lower in patients with t(8;21), resulting in a significantly inferior survival duration after relapse compared with patients with inv(16).

CONCLUSION: We provide novel prognostic factors for CBF AML and show that patients with t(8;21) who experience relapse have an inferior survival duration.

Supported by grant No. 01GI9981 from the Bundesministerium für Bildung und Forschung (Kompetenznetz "Akute und chronische Leukämien"), Germany.

Authors' disclosures of potential conflicts of interest are found at the end of this article.

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