Group demographics
| CN | CI | |
|---|---|---|
| N | 99 (57 male) | 22 (11 male) |
| Baseline age (yr) | 68.6 (7.5) | 74.1 (7.5)a |
| Median age (yr) | 68.2 | 71.2 |
| Age range (yr) | 56.1–86.0 | 61.0–85.0 |
| Scan interval (yr) | 7.4 (1.5) | 7.0 (1.7) |
| Years to symptom onset | NA | 10.9 (3.7) |
| Education (yr) | 16.3 (2.7) | 16.4 (3.0) |
| Hypertension (%) | 46.5 | 63.6 |
| Diabetes (%) | 10.1 | 13.6 |
| Hypothyroidism (%) | 7.1 | 9.1 |
| APOE 3/4 (%) | 21.2 | 22.7 |
| APOE 4/4 (%) | 4.0 | 4.5 |
↵aThe cognitively impaired group is significantly older than the normal group (p = 0.002). No other differences between the groups were noted. NA, Not applicable.