Table 2. P-values group matrices from two sample t-test for age showing that groups are appropriately balanced.
| HC | ncMCI | cMCI | AD | |
| HC | - | 0.598 | 0.843 | 0.537 |
| ncMCI | 0.598 | - | 0.525 | 0.914 |
| cMCI | 0.843 | 0.525 | - | 0.476 |
| AD | 0.537 | 0.914 | 0.476 | - |
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