Demographic, Genetic, and Cognitive Data
| Parameter | Whole sample | Lower tertile | Middle tertile | Upper tertile | P |
| Total participants (n) | 55 | 18 | 19 | 18 | |
| Age (y) | 78.5 (6.3) | 78.3 (6.8) | 77.4 (6.7) | 79.8 (5.4) | 0.34* |
| Male participants (n) | 31 (56.4%) | 11 (61.1%) | 7 (36.8%) | 13 (72.2%) | 0.10† |
| White participants (n) | 48 (87.3%) | 17 (94.4%) | 14 (73.7%) | 17 (94.4%) | 0.19† |
| Education (y) | 16.9 ± 2.3 | 16.4 ± 2.3 | 17.6 ± 1.8 | 16.6 ± 2.6 | 0.23* |
| CDR = 0.5 (n) | 7 (12.7%) | 0 (0%) | 2 (10.5%) | 5 (27.8%) | 0.04 |
| ApoE4 carrier (n) | 16 (29.1%) | 1 (5.6%) | 5 (26.3%) | 10 (55.6%) | 0.004 |