Fig. 5

Tissue expression of PD-L1 and PEM treatment cycles. Positive correlation between PD-L1 TPS and PEM cycles were revealed. PEM = Pemetrexed, PFS = progression-free survival, TPS = tumor proportion score. **: P < 0.05 (Unpaired t-test) *: P < 0.1 (Unpaired t-test)