Table 3.
Statistics on resistance metrics for GM and WM in MCI and healthy control groups.
| Main effect of group | Group by matter type interaction | Effect of matter type (GM vs. WM) | |
|---|---|---|---|
| Amplitude | F(4,54) = 1.74, p = 0.15 | F(4,54) = 2.65, p = 0.043 | F(1,54) = 517.21 ***p < 0.0001 |
| Midpoint | F(4,54) = 5.18, p = **0.001 | F(4,54) = 3.12, *p = 0.02 | F(1,54) = 99.22, ***p < 0.0001 |
| Range | F(4,54) = 2.01, p = 0.11 | F(4,54) = 1.79, p = 0.15 | F(1,54) = 85.05, ***p < 0.0001 |
| Reserve | F(4,54) = 1.3, p = 0.28 | F(4,54) = 1.94, p = 0.12 | F(1,54) = 157.14, ***p < 0.0001 |
| Sensitivity | F(4,54) = 3.19, p = *0.02 | F(4,54) = 2.83, p = 0.34 | F(1,54) = 510.83, ***p < 0.0001 |
Post hoc pairwise comparisons revealed significantly decreased WM amplitudes, ranges, reserves, and sensitivities, compared to GM and decreased GM midpoints compared to WM for each group ps < 0.0001. Post hoc pairwise comparisons revealed significantly decreased GM midpoints and resting sensitivities (ps < 0.01) and WM midpoints and resting sensitivities (ps < 0.05) in MCI compared to each control group, where ***denotes a p < 0.0001.