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Table 2: Comparison in major white matter tracts of the fractional anisotropy, mean diffusivity, and radial diffusivity of tracts crossing and not crossing WMH^{^a}
No. of Subjects with Tracts Crossing WMH Crossing WMH Not Crossing WMH P Value
Fractional anisotropy 
    Corpus callosum 24 0.539 ± 0.057 0.591 ± 0.046 .002^{^b}
    Cingulum 17 0.442 ± 0.076 0.448 ± 0.047 .152
    Association fibers 21 0.410 ± 0.054 0.424 ± 0.034 .093
    Corticospinal tract 20 0.446 ± 0.061 0.477 ± 0.032 .027
    Thalamus 16 0.452 ± 0.073 0.441 ± 0.032 .130
Mean diffusivity 
    Corpus callosum 24 0.00085 ± 0.0001 0.000932 ± 0.0001 .053
    Cingulum 17 0.0009 ± 0.0002 0.0008 ± 0.0001 .013
    Association fibers 21 0.00079 ± 0.0001 0.00078 ± 0.0001 .122
    Corticospinal tract 20 0.0008 ± 0.0001 0.0007 ± 0.0001 .047
    Thalamus 16 0.00078 ± 0.0002 0.0008 ± 0.0001 .145
Radial diffusivity 
    Corpus callosum 24 0.0006 ± 0.0001 0.0006 ± 0.0001 .140
    Cingulum 17 0.0007 ± 0.0002 0.0006 ± 0.0001 .001^{^b}
    Association fibers 21 0.0006 ± 0.0001 0.0006 ± 0.0001 .143
    Corticospinal tract 20 0.0006 ± 0.0001 0.0005 ± 0.0001 .070
    Thalamus 16 0.0007 ± 0.0002 0.0006 ± 0.0001 .126
↵a Values are means and SDs unless otherwise noted.
↵b Statistically significant.