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Clinical Trial Summary

The primary hypotheses are that coformulated pembrolizumab/vibostolimab is superior to pembrolizumab alone with respect to (1) overall survival (OS) in participants with programmed cell death 1 ligand 1 (PD-L1) tumor proportion score (TPS) ≥50%, TPS ≥1% and TPS 1% to 49%; and (2) progression-free survival (PFS) per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 by blinded independent central review (BICR), in participants with PD-L1 TPS ≥1% and TPS ≥50%.


Clinical Trial Description

n/a


Study Design


Related Conditions & MeSH terms


NCT number NCT04738487
Study type Interventional
Source Merck Sharp & Dohme LLC
Contact Toll Free Number
Phone 1-888-577-8839
Email Trialsites@merck.com
Status Recruiting
Phase Phase 3
Start date April 7, 2021
Completion date June 5, 2028

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