Table 1.
Baseline characteristics of participants (n = 139)a.
| Demographic variable | Amyloid negative n = 59 | Amyloid indeterminate n = 53 | Amyloid positive n = 27 | p-Valueb |
|---|---|---|---|---|
| FH positive, % | 66.1 | 60.4 | 81.5 | 0.166 |
| APOE4 positive, % | 33.9 | 32.1 | 59.3 | 0.041 |
| Female, % | 61 | 75.5 | 81.5 | 0.094 |
| Age at PiB scan | 59.74 (5.95) | 60.06 (6.0) | 63.3 (4.32) | 0.021 |
| Education | 15.76 (2.37) | 16 (2.3) | 16.3 (2.45) | 0.617 |
| WASI vocabulary | 64.81 (7.76) | 66.87 (5.90) | 65.52 (5.77) | 0.271 |
| WRAT reading | 105.12 (11.09) | 108.70 (8.60) | 108.48 (7.56) | 0.106 |
FH = parental family history of Alzheimer's disease; APOE4 = the varepsilon 4 allele of the apolipoprotein E gene; PiB = Pittsburgh compound B.
a
All values are mean (SD) except where otherwise indicated.
b
Reported p-value is for omnibus test of group difference.