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

Table 9

PD-L1 expression in antigen presenting cells and clinical data.

Variable	Categories	Negative		Positive		value
			(%)		(%)
Histological type	Adenocarcinoma	73	59.3	35	81.4	0.022
	Squamous cell carcinoma	46	37.4	7	16.3
	Others	4	3.3	1	2.3
Tumor grade	I and II	61	59.8	20	76.9	0.106
	III	41	40.2	6	23.1
TNM staging	I	42	34.1	17	39.5	0.416
	II	41	33.3	9	20.9
	III	27	22	13	30.2
	IV	13	10.6	4	9.3
Neoadjuvant systemic treatment	No	111	90.2	36	8.7	0.270
	Yes	12	9.8	7	16.3

TNM staging: TNM Classification of Malignant Tumours.