Table 3.
Sample Sizes to Detect 25% Reduction in APC of Selected MRI Biomarkers
AD | MCI-C | MCI-S | HC | ||||||
---|---|---|---|---|---|---|---|---|---|
Power: | 0.8 | 0.9 | 0.8 | 0.9 | 0.8 | 0.9 | 0.8 | 0.9 | |
Hipp. GM Density (Indep. ROI) | 134 | 180 | 95 | 128 | 307 | 411 | 1243 | 1665 | |
Hipp. GM Density (MarsBaR ROI) | 129 | 173 | 96 | 129 | 290 | 388 | 1204 | 1612 | |
Hipp. GM Volume (Indep. ROI) | 133 | 178 | 77 | 103 | 400 | 535 | 745 | 998 | |
Hipp. GM Volume (MarsBaR ROI) | 135 | 181 | 74 | 100 | 378 | 507 | 767 | 1028 | |
Hipp. Volume (FreeSurfer) | 242 | 324 | 129 | 173 | 452 | 606 | 1136 | 1521 | |
EC Thickness (FreeSurfer) | 328 | 439 | 214 | 286 | 1156 | 1548 | 7948 | 10648 | |
Mean Frontal Lobe Cortical Thickness (FreeSurfer) | 1037 | 1389 | 369 | 494 | 2488 | 3333 | 4727 | 6333 | |
Mean Parietal Lobe Cortical Thickness (FreeSurfer) | 629 | 842 | 515 | 689 | 1848 | 2475 | 3142 | 4209 | |
Mean Temp. Lobe Cortical Thickness (FreeSurfer) | 403 | 539 | 121 | 162 | 1405 | 1882 | 3031 | 4061 | |
Mean Frontal Lobe GM Density (MarsBaR ROIs) | 284 | 381 | 222 | 297 | 788 | 1056 | 3682 | 4932 | |
Mean Frontal Lobe GM Volume (MarsBaR ROIs) | 280 | 376 | 263 | 353 | 856 | 1147 | 1475 | 1976 | |
Mean Parietal Lobe GM Density (MarsBaR ROIs) | 384 | 514 | 373 | 499 | 1437 | 1925 | 7260 | 9726 | |
Mean Parietal Lobe GM Volume (MarsBaR ROIs) | 238 | 319 | 315 | 422 | 976 | 1308 | 1977 | 2649 | |
Mean Temp. Lobe GM Density (MarsBaR ROIs) | 157 | 210 | 129 | 173 | 456 | 610 | 1850 | 2479 | |
Mean Temp. Lobe GM Volume (MarsBaR ROIs) | 158 | 212 | 100 | 134 | 646 | 866 | 1427 | 1911 |