Effect of comorbidities/comedications on treatment outcomes with sunitinib in patients (pts) with metastatic renal cell carcinoma (mRCC): Subgroup analyses from the STAR-TOR registry.

Abstract

631 Background: Sunitinib remains an important treatment option for mRCC, but the effect of comorbidities/comedications on sunitinib treatment outcomes have not been fully explored. Methods: Data were collated from STAR-TOR, an ongoing real-world registry. Cutoff date for analysis was 19 June 2019. This subgroup analysis assessed the presence or absence of hypertension (HTN), and the use or non-use of statins and proton pump inhibitors (PPIs), determined at the time of entry to the registry. Treatment endpoints were overall survival (OS), progression-free survival (PFS) and objective response rate (ORR). OS and PFS were analyzed by Kaplan-Meier methods. Differences within subgroups were tested using Log-rank test for OS and PFS, and Fisher’s exact test for ORR. Results: 557 sunitinib-treated pts were analyzed; 366 had HTN and 191 did not, 130 used statins and 427 did not, and 165 used PPIs and 392 did not. Median (m) OS (95% confidence intervals) was similar in pts with and without HTN (25.4 [21.1, 31.5] vs 21.5 [15.2, 28.0] months; p = 0.215). mPFS (8.0 [6.5, 9.9] vs 6.3 [5.4, 8.2] months; p = 0.140) and ORR (31.2% vs 30.9%; p = 1.000) were also similar in pts with and without HTN. mOS was similar in pts who used statins vs those who did not (27.8 [20.2, 35.4] vs 24.0 [19.4, 27.3] months; p = 0.884), while mPFS was significantly longer in pts who used statins (9.4 [6.5, 13.6] vs 6.9 [5.7, 8.2] months; p = 0.044). ORR was 37.8% vs 29.0% in pts who did and did not use statins (p = 0.072). mOS was significantly shorter in pts who used PPIs vs those who did not (20.2 [14.9, 28.3] vs 25.7 [22.7, 33.0] months; p = 0.021). mPFS (5.8 [4.6, 8.2] vs 8.0 [6.5, 9.8] months; p = 0.091) and ORR (26.6% vs 33.0%; p = 0.177) were similar in pts who did and did not use PPIs. Conclusions: In sunitinib-treated pts with mRCC in a real-world registry, mPFS was significantly longer and there was a trend toward better ORR in pts who used statins, whereas mOS was significantly shorter and there was a trend toward shorter mPFS in pts who used PPIs. Common comedications may affect sunitinib treatment outcomes in pts with mRCC.