Table 1.
Demographic Characteristics and Clinical Diagnosis by Age-Group.
| Age Group, Years | n | Gender, Female, % | Years of Education, Mean | Dementia Diagnosed in Phase 1, % | Extrapolated Dementia Frequency, %, CIa | Extrapolated MCI Frequency, %, CIa |
|---|---|---|---|---|---|---|
| 60-64 | 418 | 65.3 | 7.5 | 0.72 | 0.9 (0.001-1.8) | 16.0 (12.5-19.5) |
| 65-69 | 643 | 57.5 | 6.8 | 1.40 | 1.5 (0.6-2.4) | 19.4 (16.3-22.5) |
| 70-74 | 626 | 58.8 | 6.1 | 2.40 | 8.2 (6.1-10.3) | 45.6 (41.7-49.5) |
| 75-79 | 676 | 57.1 | 5.2 | 5.33 | 12.6 (10.1-15.1) | 41.0 (37.3-44.7) |
| 80-84 | 489 | 52.1 | 4.1 | 8.18 | 27.2 (23.3-31.4) | 32.7 (28.5-36.9) |
| 85+ | 288 | 46.2 | 4.8 | 7.99 | 20.0 (15.4-24.6) | 38.7 (33.1-44.3) |
| Total | 3,140 | 56.8 | 5.8 | 4.01 | 10.8 (9.7-11.9) | 32.4 (30.8-34.0) |
Abbreviations: CI, 95% confidence interval; MCI, mild cognitive impairment.
a By extrapolation to the cohort of 3140 participants.