Table 2.
Demographic and clinical characteristics at WRAP baseline visit (mean(SD))
| Robust normative sample | Analysis sample | Significance (p) | |
|---|---|---|---|
| N | 476 | 779 | |
| Age | 53.8 (6.7) | 53.6 (6.5) | .70 |
| Female | 333 (70%) | 550 (71%) | .91 |
| Education (years) | 16.2 (2.9) | 16.3 (2.9) | .36 |
| Race/ethnicity | 90% Caucasian | 95% Caucasian | <.001 |
| 5% African American | 4% African American | ||
| 4% Hispanic | 1% Othera | ||
| 1% Otherb | |||
| WRAT-III Reading | 104.8 (10.5) | 105.6 (9.4) | .20 |
| Positive parental history of AD | 295 (62%) | 623 (80%) | <.001 |
| APOE ϵ4 carrier | 0 (0%) | 464 (60%) | <.001 |
Notes: Sample included in analyses was not included in robust normative sample. WRAT-III = Wide Range Achievement Test-Third Edition. AD = Alzheimer's disease.
aHispanic, Asian American, and Native American participants.
bAsian American and Native American participants.