Table 2.
Descriptive Statistics for the Total Sample and by Cognitive Status at Follow-up
| Variable | Full sample | Cognitive status at follow-up | |
|---|---|---|---|
| Nondementia | Dementia | ||
| Age (years) | 67.30 (10.45) | 66.68 (9.87) | 73.36 (9.79) |
| Gender (female) | 60% | 60% | 60% |
| Race (African American) | 12% | 11% | 25% |
| Race (Other) | 4% | 4% | 6% |
| Race (white) | 84% | 85% | 69% |
| Ethnicity (Hispanic) | 8% | 7% | 13% |
| Education (years) | 12.84 (2.93) | 13.05 (2.77) | 10.76 (3.56) |
| Body Mass Index | 29.05 (6.05) | 29.09 (6.09) | 28.70 (5.67) |
| Hypertension (yes) | 57% | 56% | 66% |
| Social Isolation | 0.81 (0.84) | 0.79 (0.84) | 1.01 (0.91) |
| Diabetes (yes) | 19% | 19% | 28% |
| Depressive Symptoms | 1.17 (1.68) | 1.12 (1.64) | 1.66 (1.90) |
| Smoking (yes) | 13% | 13% | 13% |
| Physical Activity | 3.14 (1.17) | 3.16 (1.15) | 2.78 (1.30) |
| APOE ε4a | 21% | 20% | 28% |
| Loneliness | 1.47 (0.54) | 1.46 (0.53) | 1.59 (0.57) |
Note: N = 12,030; n = 10,926 without dementia and n = 1,104 with incident dementia. Depressive symptoms are measured as the sum of seven symptoms (range 0–7) and physical activity is measured on a scale from 1= hardly ever or never to 4 = more than once a week.
a N = 9,808 for APOE risk status due to missing genetic information on some participants.