Table 1.
Descriptive statistics by race for study participants (N== 1,241) at Visit 1
| Variable | African American (n = 50) |
White (n = 1,191) |
Group comparison (p) |
|---|---|---|---|
| Age in years, M (SD) | 54.84 (6.55) | 53.91 (6.70) | 0.19 |
| Female gender, N (%) | 36 (72) | 834 (70) | 0.74 |
| Years of education, M (SD) | 15.36 (2.51) | 16.09 (2.45) | 0.02 |
| APOE ε4 carriers, N (%) | 25 (50) | 453 (38) | 0.13 |
| WRAP visits completed, M (SD)* | 3.4 (1.1) | 4.5 (1.1) | <0.001 |
| Body mass index, M (SD) | 33.43 (7.34) | 28.77 (6.16) | <0.001 |
| Smoking status, N (%) | |||
| Never | 19 (38) | 707 (59) | <0.001 |
| Past | 15 (30) | 397 (33) | |
| Current | 16 (32) | 87 (8) | |
| Life Event Index Score, M (SD) | 5.12 (3.51) | 2.79 (2.01) | <0.001 |
| Literacy Score, M (SD) | 46.28 (6.48) | 51.02 (4.35) | <0.001 |
| Speed & Flexibility, M (SD) | −0.96 (1.03) | 0.10 (0.95) | <0.001 |
| Working Memory, M (SD) | −0.70 (0.98) | 0.06 (0.98) | <0.001 |
| Verbal Learning & Memory, M (SD) | −0.55 (1.11) | 0.07 (0.97) | <0.001 |
*
Number of WRAP visits completed was based on most recent (last) visit rather than Visit 1.