Evaluation of PD-L1 Expression in Tumor Tissue of Patients with Lung Carcinoma and Correlation with Clinical and Demographic Data

Table 4

PD-L1 expression in TMA slides (collective analysis).

Cell type	Evaluation method	Graduation		%
Tumor cell	Intensity	Absence	99	55.9
		Weak	38	21.5
		Moderate	16	9
		Strong	4	2.3
		Ignored	20	11.3
Tumor cell	Percentage (3 categories)	Absence	99	55.9
		Up to 10%	0	0
		From 11% to 50%	1	0.6
		More than 50%	57	32.2
		Ignored	20	11.3
Tumor cell	Percentage (2 categories)	Positive	58	32.8
		Negative	99	55.9
		Ignored	20	11.3
Intratumoral immune cells	Intensity	Absence	122	68.9
		Weak	24	13.6
		Moderate	6	3.4
		Strong	5	2.8
		Ignored	20	11.3
Intratumoral immune cells	Percentage (3 categories)	Absence	122	68.9
		Up to 10%	4	2.3
		From 11% to 50%	5	2.8
		More than 50%	26	14.7
		Ignored	20	11.3
Intratumoral immune cells	Percentage (2 categories)	Positive	35	19.8
		Negative	122	68.9
		Ignored	20	11.3

Positive: more than 5% stained cells.
Negative: less than 5% stained cells.
Missing: staining problems preventing classification into positive or negative.