Table 1. Distribution of PD-L1+ specimens using different scoring criteria (N=428).

Criteria for positivity	Percentage of PD-L1+ Specimens
	Tumor cells ≥1%*	Tumor cells ≥5%@	Tumor cells ≥25%#	Stromal cells ≥1%	Immune cells ≥1%	All cell Types ≥1%
PD-L1+	341(79.67)	140(32.71)	39(9.11)	245(57.24)	57(13.32)	407(95.09)
PD-L1-	87(20.32)	288(67.29)	389(90.89)	183(42.76)	371(86.68)	21(4.91)

^* Primary criteria used in this study: ≥1% expression on tumor cell membranes with ≥1+ intensity;

^@ ≥5% expression on tumor cell membranes with ≥1+ intensity;

^#≥25% expression on tumor cell membranes with ≥2+ intensity.