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PFS in patients with (A) SQ tumor histology, (B) NSQ tumor histology, (C) ≥ 1% PD-L1 expression, and (D) < 1% PD-L1 expression. aPer local investigator; minimum follow-up: CheckMate 017: 64.2 months and CheckMate 057: 64.5 months. HR, hazard ratio; NC, not calculable; No., number; NSQ, nonsquamous; PD-L1, programmed death ligand 1; PFS, progression-free survival; SQ, squamous.
