Table 3.

All biases and their range (corrected minus uncorrected) between the pathways, the P-values of the biases, and the P-values and estimates for all regression analyses

Tract and measure	Bias	Range of bias	Difference P	Regression P	Estimate
Corpus callosum
Area under curve	17,700	[−39,800, 72,500]	0.0043	0.0113	0.117
Fractional anisotropy	–1.84e−3	[−6.61e−3, 2.94e−3]	0.0006	0.947	–2.61e−3
Mean diffusivity (mm2/s)	1.19e−5	[0.56e−5, 1.82e−5]	< 2.2e−16	0.0198	5.25e−2
Corticospinal tract
Area under curve	18,300	[−45,300, 82,000]	0.0069	0.0136	0.126
Fractional anisotropy	–1.52e−3	[−5.84e−3, 2.79e−3]	0.0014	0.258	39.1e−3
Mean diffusivity (mm2/s)	2.60e−5	[−0.01e−5, 5.21e−5]	1.63e−10	0.498	3.78e−2
Right cingulum
Area under curve	2,240	[−48,400, 52,900]	0.6617	0.845	8.41e−3
Fractional anisotropy	–4.95e−3	[−14.2e−3, 4.31e−3]	1.04e−5	0.286	−91.6e−3
Mean diffusivity (mm2/s)	1.50e−5	[0.20e−5, 2.80e−5]	5.83e−6	0.007	10.3e−2
Left cingulum
Area under curve	2,730	[−59,700, 65,200]	0.8593	0.0674	0.090
Fractional anisotropy	−3.43e−3	[−11.3e−3, 4.47e−3]	0.0002	0.868	−10.7e−3
Mean diffusivity (mm2/s)	1.33e−5	[0.32e−5, 2.35e−5]	3.80e−13	0.0169	5.78e−2