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

Table 8

PD-L1 expression in tumor cells and clinical data.

Variable	Categories	Negative		Positive		value
			(%)		(%)
Histological type	Adenocarcinoma	68	68.7	40	59.7	0.412
	Squamous cell carcinoma	28	28.3	25	37.3
	Other	3	3	2	3
Tumor grade	I and II	50	62.5	31	64.6	0.813
	III	30	37.5	17	35.4
TNM staging	I	36	36.4	23	34.3	0.756
	II	27	27.3	23	34.3
	III	26	26.3	14	20.9
	IV	10	10.1	7	10.4
Neoadjuvant systemic treatment	No	86	86.9	61	91	0.407
	Yes	13	13.1	6	9

TNM staging: TNM Classification of Malignant Tumours.