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  P3.24 - Poster Session 3 - Supportive Care (ID 160)

  • Event: WCLC 2013
  • Type: Poster Session
  • Track: Supportive Care
  • Presentations: 1
  • Moderators:
  • Coordinates: 10/30/2013, 09:30 - 16:30, Exhibit Hall, Ground Level

  • 12890

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    P3.24-037 - The cost-effectiveness of second-line crizotinib in EML4-ALK rearranged advanced non-small cell lung cancer (ID 2637)

    09:30 - 09:30  |  Author(s): J. Beca
    • Abstract

    Background
    The management of non-small cell lung cancer (NSCLC) has changed markedly over last decade with the discovery of distinct molecular and genetic changes within the lung cancer genome and the availability of new therapeutic agents to target these genetic aberrations. However, the clinical benefits observed are not without significant financial costs. These include diagnostic testing to identify molecular targets and an increasing cost of cancer treatment. Chromosomal rearrangements of the anaplastic lymphoma kinase gene (ALK) are predictive for clinical response to crizotinib, a first-in-class oral ALK inhibitor. In a recent phase 3 trial, crizotinib was associated with a higher response rate, improved progression-free survival and improved quality of life when compared with docetaxel or pemetrexed as second-line chemotherapy for advanced NSCLC following platinum-based chemotherapy. We performed an analysis to estimate the cost-effectiveness of ALK testing and crizotinib treatment in the second-line setting for patients with stage IV ALK-rearranged NSCLC in the province of Ontario, Canada.

    Methods
    We developed a Markov state-transition model to compare the costs and effectiveness of ALK testing and treatment with crizotinib in positive cases with the current standard of care (docetaxel or pemetrexed chemotherapy). Patients had stage IV NSCLC with non-squamous histology and were previously treated with a platinum-based regimen. The analysis was conducted from the Canadian public health perspective (Ontario) and a “lifetime” time horizon was used. Transition probabilities, mortality rates and costs were calculated from the Ontario Registry, Cancer Care Ontario New Drug Funding Program, Ontario Case Costing Initiative, University Health Network and published literature, including a recent second-line randomized trial of crizotinib versus chemotherapy (Shaw et al. New Engl J Med 2013). Population-based ALK testing included initial immunohistochemical (IHC) staining followed by fluorescent in-situ hybridization (FISH) for positive cases. The outcome of the analysis was incremental cost per quality-adjusted life-years (QALY). The survival impact of crizotinib in ALK-positive NSCLC was derived from a retrospective study (Shaw et al. J Clin Oncol 2012), as the second-line randomized trial of crizotinib versus chemotherapy permitted >80% crossover from the standard chemotherapy arm to crizotinib.

    Results
    The use of crizotinib compared to pemetrexed and docetaxel in ALK-rearranged NSCLC, based on our preliminary model, could yield as much as +0.309 QALY and +0.433 QALY respectively, assuming no crossover from chemotherapy to crizotinib. Incremental costs based on the preliminary model are estimated at CAD $88,446 for pemetrexed and $102,764 for docetaxel, with incremental cost-effectiveness ratios of $286,198/QALY ($162,814/life-year) and $237,575/QALY ($136,707/life-year) gained respectively. Major drivers of cost-effectiveness included the cost of drug therapy and incremental survival. Data on the impact of ALK testing on the overall cost-effectiveness ratio will be presented at the 2013 WCLC meeting, as will refined cost estimates after further model calibration.

    Conclusion
    While crizotinib therapy 2[nd] line for advanced ALK-rearranged NSCLC is clearly superior to chemotherapy, the cost-effectiveness ratio is higher than traditionally accepted thresholds, driven largely by drug cost. Payors and manufacturers should collaborate to ensure that highly effective NSCLC treatments are available and affordable to patients with NSCLC.