Abstract
415 Background: The Retrospective analysis of Sorafenib (So) as the first- or second- target therapy (RESET) study in metastatic renal cell carcinoma (mRCC) patients assessed the use and safety of sorafenib under daily-life treatment conditions in a community-based patient population in Italian centers. Methods: RESET was a retrospective, observational, non-interventional field study in mRCC patients. Treatment decisions were determined by each physician according to local prescribing guidelines and clinical practice. Patients for whom a decision to treat with sorafenib single agent as first- or second- target therapy (TT) for mRCC has been made, were eligible for inclusion. Patients that started So treatment between January 1, 2008 and December 31, 2010 were included. Data collection started retrospectively in 2012, in order to have a period of observation of at least 1 year up to 31st Dec 2011. Endpoints included safety, overall survival (OS), progression-free survival (PFS), response rate (RR), and treatment duration. Subgroup analyses included age, Eastern Cooperative Oncology Group performance status, prior therapy, number of metastases, and line of TT with So. Results: From February to Jululy 2012, 358 pts from 37 Italian centers were enrolled. The most common ≥ grade 3 drug-related adverse events were hand-foot skin reaction (6.3%), rash (2.3%), hypertension, fatigue, and diarrhea (1.7% each). In the overall population, median OS was 17.2 months (mos) (95% CI 15.5 – 19.6 mos) and median PFS was 5.9 mos (95% CI 5.0-6.8 mos). Median duration of treatment with So was 5.09 mos. Complete response was observed in 3 (0.8%) pts, partial response in 53(15.0%) pts and stable disease in 139(39.4%) pts. In pts receiving So as first- or second- TT, median OS was 19.9 mos (95% CI 15.4-25.3 mos) and 16.6 mos (95% CI 13.1-18.4 mos) respectively, and median PFS was 6.6 mos (95% CI 4.9-9.3 mos) and 5.3 mos (95% CI 4.4-6.2 mos) respectively. Conclusions: The efficacy and safety of So under routine clinical practice conditions in the setting of community-based practice in Italy were similar to that reported in prospective clinical trials. The efficacy of So was observed in the subgroup of pts receiving So as either the first or second TT for mRCC.
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