Table 1. Characteristics of CERAD registry samples.
| Characteristic | AD (N = 655) M (SD) |
NC (N = 383) M (SD) |
|---|---|---|
| Age at Baseline* | 72.1 (7.9) | 68.9 (7.9) |
| Education* | 12.6 (3.7) | 13.9 (3.1) |
| Baseline CERAD* | 39.4 (13.0) | 79.8 (9.4) |
| Baseline MMSE* | 18.48 (5.1) | 28.81 (1.6) |
| Baseline BDRS | 4.3 (2.4) | - |
| Gender [N (%)]* | ||
| Male | 281 (43) | 129 (34) |
| Female | 374 (57) | 254 (66) |
| Race [N (%)]* | ||
| Caucasian | 560 (86) | 360 (94) |
| Black | 95 (14) | 23 (6) |
| CDR Stage [N (%)]ˆ | ||
| .5 | 25 (3.8) | - |
| 1 | 386 (58.9) | - |
| 2 | 220 (33.6) | - |
| 3 | 24 (3.7) | - |
*
Significant difference between AD and NC groups at p < .001 using independent samples t tests for continuous variables and χ2 for categorical variables.
ˆ
All NCs were CDR Stage 0. Stage 0 = no dementia, 0.5 = questionable, 1 = mild, 2 = moderate, 3 = severe.
CERAD = Consortium to Establish a Registry for Alzheimer's Disease; NC = normal control; AD = Alzheimer's disease; MMSE = Mini-Mental State Examination; BDRS = Blessed Dementia Rating Scale, CDR = Clinical Dementia Rating Scale