Table 1.
Characteristics of the case-control population at time of index
| Cases of all cause dementia (n=5589) |
Age matched controls without dementia (n=55 890) |
P value | |
|---|---|---|---|
| Age, years: | |||
| Median (interquartile range) | 70 (66-73) | 70 (66-73) | 1.00 |
| <65 | 1148 (20.5) | 11 476 (20.5) | |
| 65-69 | 1466 (26.2) | 14 672 (26.2) | |
| 70-74 | 2013 (36.0) | 20 097 (36.0) | |
| ≥75 | 962 (17.3) | 9645 (17.3) | |
| Highest educational level: | |||
| Elementary school only | 2598 (46.5) | 22 590 (40.4) | <0.001 |
| Secondary school only | 67 (1.2) | 795 (1.4) | |
| Skilled worker | 2007 (35.9) | 21 879 (39.1) | |
| Theoretical education | 791 (14.2) | 8943 (16.0) | |
| Theoretical and research education | 126 (2.3) | 1683 (3.0) | |
| Annual household income: | |||
| Low | 1898 (34.0) | 13 472 (24.1) | <0.001 |
| Medium | 1331 (23.8) | 14 038 (25.1) | |
| High | 2360 (42.2) | 28 380 (50.8) | |
| Cohabitation | 1790 (32.0) | 30 732 (55.0) | <0.001 |
| Medical history: | |||
| Hypertension | 1707 (30.5) | 16 296 (29.2) | 0.03 |
| Diabetes | 623 (11.1) | 4266 (7.6) | <0.001 |
| Thyroid disease | 710 (12.7) | 5528 (9.9) | <0.001 |