Median progression-free survival was significantly longer with tivozanib (5·6 months, 95% CI 5·29–7·33) than with sorafenib (3·9 months, 3·71–5·55; hazard ratio 0·73, 95% CI 0·56–0·94; p=0·016)....study showed that tivozanib as third-line or fourth-line therapy improved progression-free survival and was better tolerated compared with sorafenib in patients with metastatic renal cell carcinoma.