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Kaplan–Meier survival curves.
Notes: (A) Positive PD-L1 expression was associated with better overall survival (P=0.042). (B) Advanced stage (III–IV) disease was associated with inferior overall survival (P=0.000). (C) Positive PD-L1 expression was associated with better progression-free survival (P=0.019). (D) Advanced stage (III–IV) disease was associated with inferior progression-free survival (P=0.000).
Abbreviation: PD-L1, programmed cell death-ligand 1.
