Table 1.
Baseline characteristics of ELSA Wave 4 participants by incident dementia status
| Overall | No dementia | Dementia | p-Value | |
|---|---|---|---|---|
| N | 7917 | 7557 | 360 | |
| Age, mean (s.d.) | 65.9 (9.5) | 65.5 (9.3) | 75.4 (9.1) | <0.0011 |
| Female, n (%) | 4349 (54.9%) | 4128 (54.6%) | 221 (61.2%) | 0.0141 |
| Level of education, n (%) | ||||
| Low | 3230 (40.8%) | 3031 (40.1%) | 199 (55.3%) | |
| Medium | 2128 (26.9%) | 2045 (27.1%) | 83 (23.1%) | <0.0011 |
| High | 2559 (32.3%) | 2481 (32.8%) | 78 (21.7%) | |
| Net-wealth, n (%) | ||||
| Low | 2511 (31.7%) | 2362 (31.3%) | 149 (41.4%) | |
| Medium | 2714 (34.3%) | 2593 (34.3%) | 121 (33.6%) | <0.0011 |
| High | 2692 (34.0%) | 2602 (34.4%) | 90 (25.0%) | |
| Level of cognitive activity engagement, n (%) | ||||
| Low | 4977 (68.3%) | 4690 (67.4%) | 287 (87.5%) | |
| High | 2314 (31.7%) | 2273 (32.6%) | 41 (12.5%) | <0.0011 |
| Level of social memberships, n (%) | ||||
| Low | 4077 (58.0%) | 3875 (57.7%) | 202 (66.2%) | |
| High | 2950 (42.0%) | 2847 (42.3%) | 103 (33.8%) | 0.0031 |
| Level of social participation, n (%) | ||||
| Low | 3301 (48.9%) | 3111 (48.1%) | 190 (67.9%) | |
| High | 3451 (51.1%) | 3361 (51.9%) | 90 (32.1%) | <0.0011 |
| LIBRAadj score, mean (s.d.)2 | 1.5 (2.4) | 1.4 (2.4) | 2.2 (2.4) | <0.0011 |
s.d., standard deviation; LIBRAadj score, LIfestyle for BRAin health score without the weight for cognitive activity.
1
Statistically significant at p≤0.05
2
Observed range −2.7 to 10.3 (theoretical range: −2.7 to 12.7).