. 2017 May 17;8(30):49702–49712. doi: 10.18632/oncotarget.17922

Table 1. Mean (± SD) MOD expression of PD-L1, VEFG, MMP-9 and Ki-67 in glioma specimens from LGG and HGG.

Index	Mean of MOD (means ± SD)		p^a
Index	LGG (n = 23)	HGG (n = 41)	p^a
PD-L1	0.005129 ± 0.001441	0.1144 ± 0.02754	0.0044
VEGF	0.02248 ± 0.004159	0.09598 ± 0.01981	0.0078
MMP	0.04203 ± 0.009844	0.07884 ± 0.01191	0.0401
Ki-67	0.01151 ± 0.003914	0.08850 ± 0.01914	0.0041

^aThe difference in MOD count between the two groups was assessed using a t-test.

Abbreviations: SD: Standard deviations; MOD: Mean optical density; PD-L1: Programmed Death Ligand 1; VEGF: Vascular endothelial growth factor; MMP-9: Matrix metallopeptidase-9, LGG: Low grade glioma; HGG: High grade glioma.