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Motzer, Robert J.; Ravaud, Alain; Patard, Jean-Jacques; Pandha, Hardev S.; George, Daniel J.; Patel, Anup; Chang, Yen-Hwa; Escudier, Bernard; Donskov, Frede; Magheli, Ahmed; Carteni, Giacomo; Laguerre, Brigitte; Tomczak, Piotr; Breza, Jan; Gerletti, Paola; Lechuga, Mariajose; Lin, Xun; Casey, Michelle; Serfass, Lucile; Pantuck, Allan J.; Stähler, Michael (2018): Adjuvant Sunitinib for High-risk Renal Cell Carcinoma After Nephrectomy: Subgroup Analyses and Updated Overall Survival Results. In: European Urology, Vol. 73, No. 1: pp. 62-68
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Background: Adjuvant sunitinib significantly improved disease-free survival (DFS) versus placebo in patients with locoregional renal cell carcinoma (RCC) at high risk of recurrence after nephrectomy (hazard ratio [HR] 0.76, 95% confidence interval [CI] 0.59-0.98;p = 0.03). Objective: To report the relationship between baseline factors and DFS, pattern of recurrence, and updated overall survival (OS). Design, setting, and participants: Data for 615 patients randomized to sunitinib (n = 309) or placebo (n = 306) in the S-TRAC trial. Outcome measurements and statistical analysis: Subgroup DFS analyses by baseline risk factors were conducted using a Cox proportional hazards model. Baseline risk factors included: modified University of California Los Angeles integrated staging system criteria, age, gender, Eastern Cooperative Oncology Group performance status (ECOG PS), weight, neutrophil-to-lymphocyte ratio (NLR), and Fuhrman grade. Results and limitations: Of 615 patients, 97 and 122 in the sunitinib and placebo arms developed metastatic disease, with the most common sites of distant recurrence being lung (40 and 49), lymph node (21 and 26), and liver (11 and 14), respectively. A benefit of adjuvant sunitinib over placebo was observed across subgroups, including: higher risk (T3, no or undetermined nodal involvement, Fuhrman grade >= 2, ECOG PS >= 1, T4 and/or nodal involvement;hazard ratio [HR] 0.74, 95% confidence interval [CI] 0.55-0.99;p = 0.04), NLR <= 3 (HR 0.72, 95% CI 0.54-0.95;p = 0.02), and Fuhrman grade 3/4 (HR 0.73, 95% CI 0.55-0.98;p = 0.04). All subgroup analyses were exploratory, and no adjustments for multiplicity were made. Median OS was not reached in either arm (HR 0.92, 95% CI 0.66-1.28;p = 0.6);67 and 74 patients died in the sunitinib and placebo arms, respectively. Conclusions: A benefit of adjuvant sunitinib over placebo was observed across subgroups. The results are consistent with the primary analysis, which showed a benefit for adjuvant sunitinib in patients at high risk of recurrent RCC after nephrectomy.