Table 7. . PD-L1 expression at baseline.

	Positive	Negative	p-value
Disease control rate			0.7445
– Yes	23 (65.7%)	14 (70.0%)
– No	12 (34.3%)	6 (30.0%)
Median overall survival (months)	NE (7.75-NE)	NE (95% CI: 10.25, NE)	0.9364
Median progression-free survival (months)	5.00 (95% CI: 4.00-NE)	8.00 (95% CI: 4.00, 12.00)	0.8585

NE: Not estimable; PD-L1: Programmed death ligand 1.