Table 4.

Correlation of expression of PDL1/PD-1 in OSCC and oral leukoplakia.

OSCC		PDL1 positive epithelial cells (labelling index)	PD1 positive lymphocytes (labelling index)
PDL1 positive epithelial cells (labelling index)	Pearson correlation	1	0.544
	Sig (2 tailed)		0.005
	N	25	25
PD1 positive lymphocytes (labelling index)	Pearson correlation	0.544	1
	Sig (2 tailed)	0.005
	N	25	25
PD1 positive lymphocytes (H score)	Pearson correlation	1	0.606
	Sig (2 tailed)		0.001
	N	25	25
PDL1 positive epithelial cells (H score)	Pearson correlation	0.606	1
	Sig (2 tailed)	0.001
	N	25	25

Oral leukoplakia		PDL1 positive TAFs (labelling index)	PD1 positive lymphocytes (labelling index)
PDL1 positive TAFs (labelling index)	Pearson correlation	1	0.358
	Sig (2 tailed)		0.079
	N	25	25
PD1 positive lymphocytes (labelling index)	Pearson correlation	0.358	1
	Sig (2 tailed)	0.079
	N	25	25

Significant values are in bold.