Table 2.

Correlation coefficients between interval and continuous variables in pure astrocytic tumors.

			rCBVmax	rCBVmean	PFS	KPS	WHO
	rCBVmax	Correlation/Coefficient Significance (2-tailed)	.	.941 .000	-.768 .001	-.720 .008	.591 .012
	rCBVmean	Correlation/Coefficient Significance (2-tailed)	.941 .000	.	-.743 .001	-.744 .005	.707 .001

rCBVmax: maximum relative cerebral blood volume

rCBVmean: mean relative cerebral blood volume

PFS: progression-free survival

KPS: Karnofsky Performance Score

WHO: World Health Organization grading of cerebral gliomas