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

Table 2 Means, SD and correlations (controlled for the effect of age and gender) in healthy brains

Tensor metric													Mean	SD
		Cs											0.756690	0.032259
FA	Pearson’s R	-0.456	FA										0.284317	0.018917
	P-value	0.029
RA	Pearson’s R	-0.992	0.434	RA									0.224873	0.029523
	P-value	0.000	0.039
Cp	Pearson’s R	-0.979	0.460	0.938	Cp								0.133346	0.017086
	P-value	0.000	0.031	0.000
Cl	Pearson’s R	-0.946	0.442	0.978	0.855	Cl							0.111574	0.016583
	P-value	0.000	0.024	0.000	0.000
L	Pearson’s R	0.372	-0.115	-0.416	-0.317	-0.186	L						0.002275	0.000100
	P-value	0.117	0.578	0.076	0.200	0.408
p	Pearson’s R	0.179	-0.095	-0.214	-0.020	-0.014	0.945	p					0.002096	0.000087
	P-value	0.477	0.652	0.395	0.938	0.953	0.000
AD	Pearson’s R	0.322	-0.012	-0.348	-0.287	0.019	0.804	0.761	AD				0.001553	0.000056
	P-value	0.179	0.952	0.144	0.249	0.933	0.000	0.000
MD	Pearson’s R	0.181	-0.096	-0.215	-0.022	-0.014	0.945	1.000	0.762	MD			0.001210	0.000050
	P-value	0.473	0.649	0.391	0.934	0.953	0.000	0.000	0.000
RD	Pearson’s R	0.053	-0.297	-0.119	0.426	-0.131	0.877	0.954	0.628	0.954	RD		0.001046	0.000072
	P-value	0.821	0.132	0.606	0.054	0.542	0.000	0.000	0.001	0.000
q	Pearson’s R	-0.077	0.698	0.019	0.257	0.138	0.138	0.153	0.393	0.152	0.406	q	0.000445	0.000055
	P-value	0.721	0.000	0.929	0.225	0.492	0.502	0.466	0.047	0.467	0.029

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