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Estimated sample sizes to observe the differences between AD and controls using cortical thickness and WMD at α = 0.05 and 1 − β = 0.8. The scales in WMD were analyzed both separately and in average.
| Power | CT (univariate) | WMD (concatenated) | WMD (scale 1) | WMD (scale 2) | WMD (scale 3) | WMD (scale 4) | |
|---|---|---|---|---|---|---|---|
| Right hemisphere | 0.8 | 22 | 18 | 18 | 19 | 21 | 24 |
| 0.9 | 29 | 24 | 24 | 25 | 28 | 33 | |
| Left hemisphere | 0.8 | 20 | 16 | 17 | 18 | 16 | 18 |
| 0.9 | 27 | 22 | 22 | 24 | 22 | 23 |
