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Sample size estimates (with 80% power) for TBM-derived measures versus SIENA-derived measures
| TBM | SIENA | ||||
|---|---|---|---|---|---|
| 1.5 T MRI | AD | MCI | 1.5 T MRI | AD | MCI |
| n80 | 37 | 107 | n80 | 116 | 207 |
| 3 T MRI | AD | MCI | 3 T MRI | AD | MCI |
| n80 | 48 | 159 | n80 | 92 | 265 |
Power was excellent at both field strengths and somewhat higher for AD than for MCI, as expected.
