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. Author manuscript; available in PMC: 2011 Aug 1.
Published in final edited form as: Neurobiol Aging. 2010 Aug;31(8):1401–1418. doi: 10.1016/j.neurobiolaging.2010.04.029

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
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