Table 2.
Within-subjects general linear model results testing differences in baseline metrics among corpus callosum and other tracts (N = 54)
| Metric | Corpus callosum tracts |
F (df) | p-value | χ2 | ||
|---|---|---|---|---|---|---|
| Splenium, Mean (SD) | Body, Mean (SD) | Genu, Mean (SD) | ||||
| AWF | 0.42 (0.03) | 0.35 (0.03) | 0.34 (0.03) | 858.88 (1.56a) | <0.001 | 0.94 |
| De,⊥ | 1.21 (0.12) | 1.44 (0.12) | 1.44 (0.13) | 322.72 (1.71a) | <0.001 | 0.86 |
| FA | 0.54 (0.05) | 0.42 (0.05) | 0.44 (0.04) | 788.19 (1.79) | <0.001 | 0.94 |
| MD | 1.17 (0.10) | 1.33 (0.09) | 1.38 (0.12) | 294.59 (1.63) | <0.001 | 0.85 |
| MK | 1.14 (0.09) | 0.97 (0.07) | 0.94 (0.07) | 576.56 (2) | <0.001 | 0.96 |
| Metric | Other tracts |
F (dfa) | p-value | χ2 | ||
| Projection, Mean (SD) | Association, Mean (SD) | Limbic, Mean (SD) | ||||
| AWF | 0.41 (0.02) | 0.35 (0.03) | 0.29 (0.01) | 1217.83 (1.51a) | <0.001 | 0.96 |
| De,⊥ | 1.15 (0.08) | 1.27 (0.13) | 1.37 (0.11) | 257.04 (1.61a) | <0.001 | 0.83 |
| FA | 0.47 (0.03) | 0.35 (0.03) | 0.30 (0.02) | 2807.71 (2) | <0.001 | 0.99 |
| MD | 1.01 (0.06) | 1.08 (0.11) | 1.20 (0.08) | 246.15 (1.62) | <0.001 | 0.82 |
| MK | 1.22 (0.06) | 1.03 (0.08) | 0.86 (0.05) | 2060.21 (1.45) | <0.001 | 0.95 |
Means across all rows were significantly different from each other at p < 0.01 with Bonferroni adjustment for multiple comparisons, except for De,⊥ in the body and splenium (p = ns).
Key: AWF, axonal water fraction; FA, fractional anisotropy; MD, mean diffusivity; MK, mean kurtosis.
a
Greenhouse-Geissereadjusted degrees of freedom for violating the assumption of sphericity.