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Cost-effectiveness of midostaurin in the treatment of newly diagnosed FLT3-mutated acute myeloid leukemia in France

BACKGROUND:

Midostaurin (MIDO) combined with standard chemotherapy was approved by the European Medicines Agency in 2017 for the treatment of adults with newly diagnosed FLT3-mutated acute myeloid leukemia (AML) based on results from the RATIFY trial.

METHODS:

A cost-effectiveness model was developed to compare MIDO and standard-of-care (SOC) to SOC alone in France. Per Haute Autorité de Santé (HAS) guidelines, a partitioned survival model with eight health states was used: diagnosis/induction, complete remission, relapse, hematopoietic stem cell transplantation (HSCT), HSCT recovery, post-HSCT recovery (stabilized after HSCT recovery), post-HSCT relapse, and mortality. A lifetime horizon was used beginning at diagnosis with a "cure model,", which assumed natural mortality after trial cut-off. Utility values were obtained from a systematic literature review and included disutilities. Resource utilization was based on HAS clinical guidelines and a survey of French physicians and included drugs and administration, adverse events, routine medical care, HSCT, and end-of-life care costs.

RESULTS:

In RATIFY and after extrapolation, MIDO improved survival compared to SOC, translating into MIDO-treated patients gaining 1.12 life years (LYs) and 1.23 quality-adjusted life years (QALYs) versus SOC. The incremental cost-effectiveness ratio (ICER) for MIDO versus SOC was €68,781 per LY and €62,305 per QALY. Sensitivity analyses showed consistency with base case findings.

CONCLUSIONS:

MIDO represents a clinically significant advancement in the management of newly diagnosed FLT3-mutated AML. In this analysis, MIDO add-on therapy showed gains in LYs and QALYs versus SOC alone and was found to be a cost-effective option at a €100,000 per QALY threshold for end-of-life treatment.

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S8064 Midostaurin (PKC412) Midostaurin (pkc412, CGP 41251) is a multi-targeted kinase inhibitor, including PKCα/β/γ, Syk, Flk-1, Akt, PKA, c-Kit, c-Fgr, c-Src, FLT3, PDFRβ and VEGFR1/2 with IC50 ranging from 80-500 nM. (29) (2)

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PKC