Table 1.
Descriptive Statistics of Brain and Cognitive Measures.
| Measure | Mean | SD | Min | Max |
|---|---|---|---|---|
| Beta-Amyloid | 1.29 | 0.26 | 0.96 | 2.35 |
| Cortical Thickness | 2.67 | 0.12 | 2.33 | 2.93 |
| Trails A | 36.36 | 12.18 | 11 | 100 |
| Trails B | 91.74 | 49.21 | 31.79 | 300 |
| Digit Symbol | 47.30 | 10.63 | 19 | 86 |
| Logical Memory Immediate | 15.04 | 3.25 | 8 | 24 |
| Logical Memory Delayed | 13.77 | 3.28 | 6 | 25 |
| FAS | 44.67 | 13.54 | 13 | 92 |
| Category Fluency | 44.61 | 9.84 | 19 | 79 |
| Boston Naming Test | 27.73 | 2.55 | 15 | 30 |
| AMNART | 121.07 | 9.16 | 78 | 132 |
| MMSE | 29.03 | 1.06 | 25 | 30 |
| Average Ability Discrepancy | 0.00 | 0.69 | −1.77 | 1.97 |
| Speed Discrepancy | 0.00 | 0.83 | −2.75 | 2.61 |
| Memory Discrepancy | 0.00 | 1.08 | −3.56 | 2.78 |
| Executive Function Discrepancy | 0.00 | 0.95 | −2.59 | 4.16 |
| Language Discrepancya | 0.00 | 0.84 | −3.55 | 2.03 |
| Verbal-Visual Discrepancy | 0.00 | 0.67 | −2.07 | 2.24 |
| Logical Memory Composite | 0.00 | 0.95 | −2.27 | 2.94 |
a
Only the AMNART was used to represent crystallized ability in this discrepancy score.