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  • Title: Treatment patterns: targeted therapies indicated for first-line management of metastatic renal cell carcinoma in a real-world setting.
    Author: Hess G, Borker R, Fonseca E.
    Journal: Clin Genitourin Cancer; 2013 Jun; 11(2):161-7. PubMed ID: 23267717.
    Abstract:
    BACKGROUND: Limited information on real-world treatment patterns of targeted agents for metastatic renal cell carcinoma (mRCC) is available to inform their use in clinical practice. PATIENTS AND METHODS: This retrospective observational study used US claims data (from January 2007 to November 2010) to identify treatment patterns, including treatment duration and dosing, for molecular-targeted agents (sunitinib, sorafenib, pazopanib, bevacizumab, and temsirolimus) indicated in first-line management of advanced and/or mRCC. The study included adult patients with mRCC who were observable for ≥3 months after initiation of their first-line therapy with a targeted agent. Descriptive analyses were conducted for observed treatment patterns. RESULTS: Of the 273 patients on first-line therapy identified and included in the sample, 235 patients were treated with sunitinib, 16 patients with sorafenib, and 15 patients with temsirolimus. Pazopanib and bevacizumab were excluded from the analysis due to the small sample size, n < 10. The median observed treatment durations were sunitinib 98 days, sorafenib 121 days, and temsirolimus 78 days. Approximately 76% (178/235) of patients who received sunitinib initiated therapy at the indicated dose of 50 mg; 65% of these patients were not observed filling a fourth prescription, whereas 23% maintained their starting dose and 12% experienced dose reduction at their 4+ fill. The mean starting dose for patients who initiated on sorafenib (n = 16) was 725 mg and for temsirolimus (n = 15) was 25 mg: their study samples were insufficient for further, meaningful dosing analyses. CONCLUSIONS: Results of this study suggest that opportunities exist to improve treatment duration in clinical practice and to better understand influences on treatment and dose changes.
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