The purpose of this study is to evaluate the efficacy and safety of lenvatinib (MK-7902/E7080) in combination with pembrolizumab (MK-3475) in the treatment of cisplatin-ineligible participants with a Programmed Cell Death-Ligand 1 (PD-L1) Combined Positive Score (CPS) ≥10, or in participants ineligible for any platinum-containing chemotherapy regardless of CPS, with advanced/unresectable or metastatic urothelial carcinoma (UC).
The primary hypotheses for this study are that:
Pembrolizumab + lenvatinib is superior to pembrolizumab + placebo with respect to Progression-free Survival (PFS) per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) by blinded independent central review (BICR), and
Pembrolizumab + lenvatinib is superior to pembrolizumab + placebo with respect to Overall Survival (OS).
With Amendment 3 (effective: September [Sep]-24-2021) participants discontinued lenvatinib and placebo; participants who remained on treatment in the study arms received open-label pembrolizumab.
With Amendment 3 the external Data Monitoring Committee was discontinued.
With Amendment 4 (effective: December-5-2022) Second Course will no longer be offered. Any participant receiving Second Course treatment prior to initiation of Amendment 4 will be able to complete treatment as planned.
With Amendment 4 study participation will end after the final administration of pembrolizumab. Participants who either complete 35 administrations of pembrolizumab or discontinue pembrolizumab will discontinue from the study following the safety follow-up visit. AEs and spontaneously reported pregnancies will be reported and followed per protocol. All participants in efficacy follow-up prior to initiation of Amendment 4 will stop efficacy assessments and be discontinued from the study. All participants in survival follow-up prior to initiation of Amendment 4 are considered to have completed the study and should have a final survival contact. The overall study ends when the last participant completes the last study-related contact or visit, withdraws from the study, or is lost to follow-up.
