Abstract
583 Background: Currently three targeted agents are available for the treatment of mCRC. Making the right choice requires balancing efficacy, safety, quality of life, and, in cost-constrained systems, cost. This study aims to determine the most cost effective treatment in each line of therapy for mCRC through systematic review of published CE analyses (CEA). Methods: Literature was searched in Medline, Cancerlit, EMBASE, Cochrane, CINAHL, BIOSIS, Web of Science, Tufts CEA registry, ASCO and ASCO GI for CEAs of the three mCRC targeted agents, cetuximab, bevacizumab, and panitumumab. Manuscripts from 2004-2011 and abstracts from 2009-2011, published in English and considering payer/societal perspectives were included. Incremental CE ratios (ICERs) were converted to US$ using 2010 purchasing power parity. Results: 15 models from six countries were identified. Mean incremental costs per quality adjusted life year (QALY) and per life year (LY) gained are shown in the Table. All four models evaluating cetuximab in 1st line therapy, and only one of the six in 2nd+ line therapy, were done among biomarker selected KRAS wild type patients. Cetuximab’s cost effectiveness in 1st line therapy was driven by its ability to convert initially unresectable liver metastasis to resectable. Conclusions: Lower ICERs appear to be associated with the use of a predictive biomarker and / or a sub patient population that can benefit the most from a treatment. With the KRAS biomarker and its potential curative benefit in patients with initially unresectable liver metastasis, cetuximab appears to be the most cost-effective targeted agent in 1st line mCRC treatment. In 2nd or later lines, direct CEA between the three agents in comparable biomarker selected patients are needed to determine the most cost effective agent. [Table: see text]
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