Table 1 Descriptive statistics of demographic variables and main study variables for the IDEAL study sample
Characteristic | Sample who took part in the IDEAL study at baseline (n = 1502) | Missing | Sample who took part in the PROTECT study in 2019 (n = 6053) | Missing |
|---|---|---|---|---|
Age in years, Mean (SD) | 76.3 (8.5) | 0 | 66.1 (7.1) | 0 |
Sex (Women; n (%)) | 657 (43.7) | 0 | 4612 (76.2) | 0 |
Education (n (%)) | 34 | 0 | ||
Below university | 1176 (80.1) | 1491 (24.6) | ||
University | 292 (19.9) | 4562 (75.4) | ||
Current employment (Yes; n (%)) | 3 | 0 | ||
In paid employment | 41 (2.7) | 1957 (32.3) | ||
Retired | 1414 (94.3) | 2162 (35.7) | ||
Unemployed/doing voluntary (unpaid) work | 44 (2.9) | 1934 (32.0) | ||
Diagnosis subtype (n (%)) | 0 | Not applicable | ||
Alzheimer’s disease | 833 (55.5) | |||
Vascular dementia | 167 (11.1) | |||
Mixed (Alzheimer’s and vascular) | 315 (21.0) | |||
Frontotemporal dementia | 53 (3.5) | |||
Parkinson’s disease dementia | 42 (2.8) | |||
Dementia with Lewy bodies | 52 (3.5) | |||
Unspecified/other | 40 (2.7) | |||
ACE-III total score, Mean (SD) | 69.12 (13.12) | 103 | Not applicable | |
Attention | 13.87 (2.99) | |||
Memory | 13.49 (5.38) | |||
Verbal fluency | 6.75 (3.06) | |||
Language | 22.45 (3.63) | |||
Visuospatial ability | 12.51 (3.25) | |||
Attitudes toward own aging, Mean (SD) | 2.36 (1.58) | 2.62 (0.79) | ||
Depression (Depressed; n(%)) | 441 (30.1) | 38 | 1496 (24.8) | 27 |
Functional ability (Dependent; n(%)) | 1318 (90.9) | 52 | 463 (7.7) | 0 |
Self-rated health, (n (%)) | 4 | 11 | ||
Poor | 201 (13.4) | 120 (2) | ||
Fair | 354 (23.6) | 765 (12.7) | ||
Good | 842 (56.2) | 3299 (54.6) | ||
Excellent | 101 (6.7) | 1858 (30.8) | ||
Co-morbidity; Mean (SD) | 2.91 (1.91) | 103 | Not applicable | |