Table 7.

Correlation of GLUT1 and OCT3/4 expression with tumor grade

	Grade	GLUT1	Co-expression*
Grade
Spearman correlation	1	0.4461	0.6505
Sig. (2-tailed)	–	0.001	< 0.001
N	50	50	50
GLUT1
Spearman correlation	0.4461	1	0.4632
Sig. (2-tailed)	0.001	–	< 0.001
N	50	50	50
Co-expression*
Spearman correlation	0.6505	0.4632	1
Sig. (2-tailed)	< 0.001	< 0.001	–
N	50	50	50
OCT3/4
Spearman correlation	0.6499	0.618	0.6974
Sig. (2-tailed)	< 0.001	< 0.001	< 0.001
N	50	50	50

*Co-expression of both GLUT1 and OCT3/4 markers