Table 1.
Sample characteristics at baseline.
| Baseline sample characteristics | Total sample n = 6817 |
|---|---|
| N (%)/Mean (SD) | |
| Age at baseline (years) | 64.6 (9.3) |
| Age groups | |
| 50–59 years | 2487 (36.5) |
| 60–69 years | 2332 (34.2) |
| ≥70 years | 1998 (29.3) |
| Gender | |
| Female | 3667 (53.8) |
| Male | 3159 (46.2) |
| APOE-ε4 present | 1724 (25.3) |
| Currently smoker | 978 (15.2) |
| Married | 2108 (30.9) |
| Wealth | |
| Low | 2154 (32.5) |
| Intermediate | 2234 (33.6) |
| High | 2251 (33.9) |
| Educational attainment (years) | 13.7 (3.8) |
| Limited life health condition (any) | 2132 (31.3) |
| Depression diagnosis | 735 (13.3) |
| Cognition | |
| Memory score | 10.4 (3.4) |
| Executive function score | 20.7 (6.3) |
APOE-ε4 two ε4 alleles of the Apolipoprotein E gene, SD standard deviation.