Table 1.
Demographic and clinical characteristics of the sample (n=423)
| Mean (SD) or n (%) | Range | |
|---|---|---|
| Age | 69.4 (6.6) | 60–89 |
| Sex | ||
| Male | 192 (45.4%) | - |
| Female | 231 (54.6%) | - |
| Education | ||
| <15 yrs | 264 (62.4%) | - |
| >15 yrs | 157 (37.1%) | - |
| HADS depression score | 2.6 (2.3) | 0–14 |
| HADS anxiety score | 4.3 (2.9) | 0–15 |
| Aβ+ | 97 (22.9%) | - |
| APOE ε4 carrier | 115 (27.2%) | - |
| BDNFMet carrier | 156 (36.9%) | |
| Cortisol (ng/mL) | 143.9 (62.7) | 19.6–522.7 |
| Executive function composite score | 0.01 (0.8) | −2.16–2.63 |
| Attention composite score | 0.02 (0.8) | −1.67–2.41 |
Note. HADS, Hospital Anxiety and Depression Scale; Aβ+, PET scans with above threshold levels of β-amyloid; APOE ε4 carrier, individuals with 1 or 2 copies of the apoliprotein epsilon 4 allele; BDNFMet carrier, brain-derived neurotrophic factor val66Met allele carrier; SD, standard deviation