Table 1.
Baseline Demographics of the Alzheimer’s Disease Neuroimaging Initiative Cohorta
| Variable | Study Arm
|
||
|---|---|---|---|
| Healthy Control Subjects | Mild Cognitive Impairment | Alzheimer Disease | |
| No. at baseline (No. at 1y) | 58 (54) | 396 (345) | 112 (97) |
| Age. mean (SD), y | 75 (6) | 75 (8) | 75 (8) |
| Male-female ratio | 30:28 | 256:140 | 65:47 |
| ApoE allele carrier, % | 8.6 | 53.3 | 67.9 |
| Mini-Mental State Examination score, mean (SD) | 28.9 (1.2) | 27.0 (1.8) | 23.6 (1.9) |
| Cognitive Dementia Rating Scale global score | 0.0 | 0.5 | 0.5 (n = 59), 1.0 (no = 53) |
a
The clinical diagnosis at the time of study enrollment is referred to as baseline. The clinical status at baseline determined the visit and procedure schedule for participants enrolled in the study.