No abstract

Background:This retrospective register study assessed overall survival (OS) and influential factors on OS in Swedish renal cell carcinoma (RCC) patients.Methods:Using three merged national health registers, Cox proportional-hazards analysis was conducted and, in three models, it was used to assess the impact of cytokine (interferon-α and tyrosine kinase inhibitor (TKI; sunitinib or sorafenib) treatment on OS in metastatic (m)RCC.Results:From 2000 to 2008, 8009 patients were diagnosed with RCC and 2753 with mRCC (2002–2008). Median OS in RCC patients diagnosed from 2006 to 2008 compared with 2000–2005 was not reached vs 47.9 months (P<0.001), and in mRCC patients diagnosed from 2006 to 2008 compared with 2002–2005, was 12.4 vs 9.6 months, respectively (P=0.004). Factors associated with significantly improved OS in RCC were female gender, lower age, and previous nephrectomy, and, in mRCC female gender, previous nephrectomy, and any TKI prescription (Model 1: median-adjusted OS, 19.4 months (TKI patients) vs 9.7 months (non-TKI patients); hazard ratio, 0.621; P<0.001).Conclusion:OS was improved in Swedish patients diagnosed with RCC and mRCC in the period 2006–2008 compared with 2000–2005 (RCC) and 2002–2005 (mRCC). Although multifactorial in origin, results suggest that increased nephrectomy rates and the use of TKIs contributed to the improvement seen in mRCC patients.

Failure to correct for crossover may lead to suboptimal decisions by pricing and reimbursement authorities, thereby limiting an effective drug's potential.

This retrospective study documents that the implementation of targeted therapy has resulted in significantly improved treatment rates and overall survival in a complete national cohort of treated mRCC patients.

RESULTS• Sunitinib was more effective and less costly than sorafenib (gains of 0.52 PFLYs, 0.16 LYs and 0.17 QALYs and savings/patient of $13 576 in the US) and bevacizumab plus IFN-α (gains of 0.19 PFLYs, 0.23 LYs and 0.16 QALYs in both countries and savings/patient of $67 798 and $47 264 in the US and Sweden, respectively).• Results were most influenced by hazard ratios for progression-free and overall survival and treatment costs, making results generalizable across other countries if relative costs were to fall within the ranges of those in the US and Sweden. CONCLUSION• The present analyses suggest that firstline mRCC treatment with sunitinib is a costeffective alternative to sorafenib and bevacizumab plus IFN-α .