. Author manuscript; available in PMC: 2012 Nov 1.

Published in final edited form as: J Magn Reson Imaging. 2011 Sep 19;34(5):1080–1091. doi: 10.1002/jmri.22725

Table 2.

Tensor invariant and eigenvalue data at grade-1 and grade-2 histological locations. The means ± one standard deviation (norm and FA) and median ± one standard deviation (mode) are listed as well as the 95% confidence interval for the means (norm, FA and eigenvalues) and median (mode) drawn from 1000 iterations of bootstrapping. Median was used for tensor mode statistics due to its non-normal distribution

Parameter	Mean or Median ± SD		Bootstrapped 95% CI
Parameter	Grade-1	Grade-2	Grade-1	Grade-2
Norm (mm²/s)	1.27e-3±0.17e-3	1.28e-3±0.14e-3	[1.22e-3;1.32e-3]	[1.24e-3;1.33e-3]
FA	0.33±0.09	0.34±0.08	[0.30;0.36]	[0.32;0.37]
Mode	0.57±0.35	0.53±0.49	[0.35;0.78]	[0.27;0.66]
λ₁ (mm²/s)	0.95e-3±0.13e-3	0.98e-3±0.11e-3	[0.92e-3;0.10e-3]	[0.95e-3;0.10e-3]
λ₂ (mm²/s)	0.64e-3±0.11e-3	0.67e-3±0.10e-3	[0.61e-3;0.68e-3]	[0.63e-3;0.70e-3]
λ₃ (mm²/s)	0.50e-3±0.09e-3	0.49e-3±0.09e-3	[0.48e-3;0.53e-3]	[0.46e-3;0.51e-3]