. Author manuscript; available in PMC: 2009 Apr 1.

Published in final edited form as: Magn Reson Imaging. 2008 Apr;26(3):379–392. doi: 10.1016/j.mri.2007.07.007

Table 5.

Statistical significance of σ_θ calculated from Eq. (B8) based on ${\hat{θ}}_{G}$ calculated from Eq. (15) in the hippocampus region of three subject groups.

A. Recovered σ_θ (Mean±SD)
σ_θ(degree)	AD		MCI		Control
Hippocampus ^nr	59.07 ± 10.48		46.03 ± 5.36		30.30 ± 6.81
Hippocampus ^rg	54.99 ± 12.99		49.00 ± 7.33		32.78 ± 8.61
B. One-way unbalanced ANOVA for σ_θ of three subject groups
Measurement	F_nr(2,23)	p-value_nr		F_rg(2,23)	p-value_rg
σ_θ	26.209	<0.0001		10.392	0.0006
C. Pairwise T-test between three subject groups
One-tail t-test for σ_θ^nr			One-tail t-test for σ_θ^rg
AD vs. MCI ^**	p = 0.0042		AD vs. MCI		p = 0.2594
MCI vs. CONTROL ^**	p = 0.0008		MCI vs. CONTROL ^**		p = 0.0047
AD vs. CONTROL ^***	p < 0.0001		AD vs. CONTROL ^***		p = 0.0002
D. Kruskal-Wallis Nonparametric Tests for σ_θ of three subject groups
Measurement	H_nr	p-value_nr		H_rg	p-value_rg
σ_θ	17.939	0.0001		11.478	0.0032

nr – no CSF voxels regression, rg – with CSF voxels regression.

indicates p < 0.05

^**

indicates p < 0.01

^***

indicates p < 0.001.