A cost-utility analysis of gemcitabine plus nab-paclitaxel in metastatic pancreatic cancer.
e17569 Background: FOLFIRINOX has been shown to be superior to gemcitabine (gem) alone for metastatic pancreatic cancer (MPC) and has been established as the standard of care. A recent study (von Hoff et al, GI ASCO 2013) showed that gem + nab-paclitaxel (gem+nab-p) was superior to gem alone. The cost-effectiveness of gem+nab-p relative to gem or FOLFIRINOX has not been studied. Methods: A Markov cohort model was constructed for patients with MPC to examine the costs and outcomes of gem alone, gem+nab-p and FOLFIRINOX. Efficacy and side-effect data were obtained from pivotal phase III trials. Resource utilization data, unit costs and utilities were obtained from Ontario Ministry of Health and Long-Term Care, Sunnybrook Health Sciences Centre and the literature. The primary outcome was the incremental cost-effectiveness ratio (ICER) defined as cost per quality-adjusted life year (QALY). The analysis was conducted from the perspective of the Canadian public healthcare system over a 2-year time horizon adjusted to 2012 Canadian dollars (CAD$). Both cost and effectiveness were discounted at 5%. One way and probabilistic sensitivity analyses were performed. Results: Using gem as the base case, gem+nab-p had better outcomes but higher costs (see Table). The ICER was higher than conventional willingness-to-pay (WTP) threshold. Gem+nab-p was less effective but less costly when compared with FOLFIRINOX. It was dominated by combinations of gem and FOLFIRINOX (i.e. extended dominance), and therefore not cost-effective regardless of WTP threshold. If the price of nab-p was 20% lower, then gem+nab-p and FOLFORINOX would have similar cost-effectiveness. Conclusions: Gem+nab-p is not cost-effective, from the Canadian perspective, for the treatment of MPC based on the current price when compared with FOLFIRINOX. A lower-priced generic oxaliplatin, which is available in some jurisdictions including the United States, may affect the outcome of this analysis in further favor of FOLFIRINOX. [Table: see text]