Q-TWiST analysis of tivozanib (T) versus sorafenib (S) in patients with advanced renal cell carcinoma (RCC) in the TIVO-3 study.

Authors

null

Michael Szarek

SUNY Downstate Medical Center, Brooklyn, NY

Michael Szarek , Michael N. Needle , Brian I. Rini , Sumanta K. Pal , David F. McDermott , Michael B. Atkins , Thomas E. Hutson , Bernard Escudier

Organizations

SUNY Downstate Medical Center, Brooklyn, NY, Aveo Oncology, Boston, MA, Vanderbilt-Ingram Cancer Center, Nashville, TN, Department of Medical Oncology & Therapeutics, City of Hope Comprehensive Cancer Center, Duarte, CA, Beth Israel Deaconess Medical Center, Dana-Farber/Harvard Cancer Center, Boston, MA, Georgetown Lombardi Comprehensive Cancer Center, Washington, DC, Texas A&M College of Medicine, Bryan, TX, Gustave Roussy, Villejuif, France

Research Funding

Pharmaceutical/Biotech Company
AVEO Oncology.

Background: In the randomized phase III study TIVO-3, the VEGFR-TKI tivozanib (TIVO) increased progression-free survival with better tolerability but no difference in overall survival (OS) relative to sorafenib (SORA) as third- or fourth-line therapy in patients with metastatic RCC. These results provide motivation to apply quality-adjusted time without symptoms of disease and toxicity (Q-TWiST) methods to quantify the net health benefits of TIVO, in the presence of similar survival, when compared to SORA. Methods: In application of Q-TWiST, patient-level OS was subdivided into three mutually exclusive states: time with toxicity (TOX), time without symptoms and toxicity (TWiST), and time after progression/relapse (REL). Mean Q-TWiST was calculated by applying utility coefficients of 0.5, 1.0, and 0.5 to the restricted mean (max 36 months follow-up) health states of TOX, TWiST, and REL, respectively; 95% CIs for the means and mean differences were estimated by bootstrap distributions. Relative Q-TWiST gain was defined as the mean absolute Q-TWiST difference divided by the SORA mean OS. Results: Mean TWiST was significantly longer for TIVO than for SORA (10.30 months v.5.35 months; Table). Mean REL time was significantly shorter for TIVO, with no difference in mean TOX time. Mean Q-TWiST was 15.04 and 12.78 months for TIVO and SORA, respectively, a statistically significant difference (p=0.0493). The relative gain for TIVO was 11.2%. Clinical trial information: NCT02627963. Values in table are mean (95% CI) in months or p-value for difference in treatment group means. Conclusions: The difference in Q-TWiST in TIVO-3 was primarily driven by benefits of TIVO in TWiST, partially offset by superiority of SORA in REL time. As a third- or fourth-line treatment for RCC, TIVO significantly increased Q-TWiST relative to SORA, primarily through an increase in TWiST, which is generally considered to be the state with highest utility to patients. Consequently, Q-TWiST may be considered an alternative patient-centered measure of benefit of TIVO in these settings.

Restricted mean durations of health states with 36 month maximum follow-up.

Health StateTivozanib
(n=175)
Sorafenib
(n=175)
Differencep-value
TOX1.29 (0.86, 1.81)1.15 (0.86, 1.51)0.14 (-0.45, 0.70)0.65
TWiST10.30 (8.32, 12.33)5.35 (4.42, 6.48)4.95 (2.56, 7.38)<0.0001
REL8.18 (6.35, 10.18)13.71 (11.81, 15.59)-5.53 (-7.84, -2.88)<0.0001
Q-TWiST15.04 (13.36, 16.74)12.78 (11.56, 14.05)2.25 (0.01, 4.51)0.0493

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Abstract Details

Meeting

2021 Genitourinary Cancers Symposium

Session Type

Poster Session

Session Title

Poster Session: Renal Cell Cancer

Track

Renal Cell Cancer

Sub Track

Symptoms, Toxicities, and Whole-Person Care

Clinical Trial Registration Number

NCT02627963

Citation

J Clin Oncol 39, 2021 (suppl 6; abstr 298)

DOI

10.1200/JCO.2021.39.6_suppl.298

Abstract #

298

Poster Bd #

Online Only

Abstract Disclosures