Table 1.
Characteristics of Participants in the Aging, Demographics and Memory Study (n=725).
| Total Cohort* |
Above Average | Average | Below Average |
|
|---|---|---|---|---|
| Variables | (n=725) | (n=189, 29%) | (n=424, 64%) | (n=46, 7%) |
| Demographics | ||||
| Age ( mean years, SD ) | 81.8 (7.2) | 81.6 (7.1) | 81.5 (7.1) | 80.1 (6.8) |
| % Female | 59 | 60 | 61 | 35 |
| Race | ||||
| % African American | 16 | 12 | 16 | 37 |
| % Latino | 8 | 7 | 8 | 11 |
| Genetic Risk Factor | ||||
| % with ApoE-ε4 | 29 | 32 | 28 | 26 |
| Educational Markers | ||||
| Education Level (mean years, SD) |
10.3 (4.3) | 12.2 (4.0) | 10.3 (3.7) | 7.5 (3.5) |
| Educational Level (median, range) |
12.0 (0-17) | 12.0 (0-17) | 11.0 (0-17) | 7 (0-17) |
| Wide Range Achievement Test Reading recognition Subtest score (mean, SD) |
55 (44) | 55 (43) | 53 (44) | 56 (43) |
| Failed a subject | 20 | 11 | 21 | 52 |
| % Held back or tutored | 15 | 10 | 16 | 26 |
| Center for Epidemiologic Depression Scale (mean, SD) |
1.9 (2.0) | 1.6 (1.9) | 1.9 (1.9) | 2.7 (2.4) |
|
Comorbidities (self- reported) |
||||
| % high blood pressure | 53 | 48 | 56 | 49 |
| % diabetes mellitus | 17 | 18 | 16 | 27 |
| % heart disease | 29 | 27 | 29 | 38 |
| % stroke | 17 | 19 | 16 | 13 |
| Childhood SES | ||||
| US Region of Birth** | ||||
| South | 45 | 39 | 47 | 56 |
| West | 11 | 8 | 12 | 19 |
| Midwest | 27 | 33 | 25 | 16 |
| Northeast | 17 | 20 | 16 | 9 |
| Parent with the highest education level (mean, SE) |
8.2 (2.5) | 8.6 (2.5) | 8.3 (2.5) | 7.8 (1.8) |
| (%) Family poor | 38 | 38 | 37 | 47 |
| (%) Family hardship | 25 | 30 | 22 | 25 |
| (%) Father absent | 10 | 4 | 11 | 19 |
| Current SES | ||||
| Respondents' income (in dollars, SD) |
2102 (17900) | 5167 (33876) | 1153 (5525) | 1176 (4773) |
| Current assets (in dollars, SD) |
268111(5678 52) |
456071 (910460) | 223191 (376336) |
138049(3409 03) |
*
66 Participants with missing information on educational performance excluded
**
61 Participants were missing information on region of birth