Partial correlation analyses of global diffusion tensor imaging-derived metrics in glioblastoma multiforme: Pilot study

Table 3 Means, SD and correlations (controlled for the effect of age and gender) in brains with glioblastoma multiforme

Tensor metric													Mean	SD
		Cs											0.771562	0.066812
FA	Pearson’s R	-0.570	FA										0.253531	0.028425
	P-value	0.003
RA	Pearson’s R	-1.000	0.592	RA									0.201778	0.053287
	P-value	0.000	0.002
Cp	Pearson’s R	-0.936	0.576	0.901	Cp								0.133265	0.043503
	P-value	0.000	0.003	0.000
Cl	Pearson’s R	-0.904	0.819	0.969	0.803	Cl							0.098462	0.011929
	P-value	0.000	0.000	0.000	0.000
L	Pearson’s R	0.096	0.151	0.009	-0.159	0.182	L						0.002111	0.000140
	P-value	0.648	0.472	0.967	0.446	0.469
p	Pearson’s R	0.156	-0.129	-0.094	-0.216	-0.177	0.834	p					0.001961	0.000123
	P-value	0.456	0.540	0.664	0.299	0.482	0.000
AD	Pearson’s R	-0.111	0.343	0.191	0.053	0.173	0.871	0.881	AD				0.001397	0.000080
	P-value	0.596	0.094	0.372	0.803	0.492	0.000	0.000
MD	Pearson’s R	0.154	-0.125	-0.090	-0.215	-0.173	0.837	1.000	0.883	MD			0.001132	0.000071
	P-value	0.462	0.550	0.675	0.303	0.491	0.000	0.000	0.000
RD	Pearson’s R	0.305	-0.411	-0.260	-0.360	-0.395	0.706	0.954	0.699	0.953	RD		0.000999	0.000073
	P-value	0.139	0.041	0.219	0.077	0.105	0.000	0.000	0.000	0.000
q	Pearson’s R	-0.484	0.928	0.539	0.466	0.736	0.430	0.187	0.629	0.191	-0.114	q	0.000363	0.000048
	P-value	0.014	0.000	0.007	0.019	0.001	0.032	0.371	0.001	0.361	0.588

MD: Mean diffusivity; FA: Fractional anisotropy; RA: Relative anisotropy; RD: Radial diffusivity; AD: Axial diffusivity; Cs: Spherical tensor; p: Pure isotropic diffusion; q: Pure anisotropic diffusion; L: Total magnitude of the diffusion tensor; Cl: Linear tensor; Cp: Planar tensor.