Table 2.
Sample characteristics in 2007–09 by dementia status at the end of follow-up (March 31, 2019)
| No dementia (n=5417) | Dementia*(n=270) | p value† | ||
|---|---|---|---|---|
| Percentage of cohort | 95·2% | 4·8% | .. | |
| Age at baseline, years | 65·5 (5·8) | 71·4 (4·9) | <0·0001 | |
| Sex | 0·032 | |||
| Female | 1463 (27·0%) | 89 (33·0%) | .. | |
| Male | 3954 (73·0%) | 181 (67·0 %) | .. | |
| Education | <0·0001 | |||
| Lower secondary school or less | 2224 (41·1%) | 150 (55·6%) | .. | |
| Higher secondary school | 1497 (27·6%) | 59 (21·9%) | .. | |
| University degree or higher | 1696 (31·3%) | 61 (22·6%) | .. | |
| Occupation | <0·0001 | |||
| Low | 552 (10·2%) | 57 (21·1%) | .. | |
| Intermediate | 2414 (44·6%) | 116 (43·0%) | .. | |
| High | 2451 (45·2%) | 97 (35·9%) | .. | |
| Cognitive impairment definitions | ||||
| (1) Age and sex threshold for poor cognitive performance | 730 (13·5%) | 91 (33·7%) | <0·0001 | |
| (2) Cognitive decline | 1351 (24·9%) | 134 (49·6%) | <0·0001 | |
| (3) Age and sex threshold for poor cognitive performance plus cognitive decline | 278 (5·1%) | 60 (22·2%) | <0·0001 | |
| (4) Age, sex, and education threshold for poor cognitive performance | 742 (13·7%) | 95 (35·2%) | <0·0001 | |
| (5) Age, sex, and education threshold for poor cognitive performance plus cognitive decline | 284 (5·2%) | 63 (23·3%) | <0·0001 | |
| (6) Age, sex, and occupation threshold for poor cognitive performance | 734 (13·6%) | 92 (34·1%) | <0·0001 | |
| (7) Age, sex, and occupation threshold for poor cognitive performance plus cognitive decline | 293 (5·4%) | 61 (22·6%) | <0·0001 | |
Data are n (%), %, or mean (SD), unless otherwise specified.
*
Dementia subtypes were Alzheimer's disease (n=108), vascular dementia (n=43), Parkinson's dementia (n=9), mixed Alzheimer's and vascular dementia (n=14), mixed vascular and Parkinson's dementia (n=2), mixed Alzheimer's and Parkinson's dementia (n=4), and other or missing subtype (n=90).
†
p values for differences in χ2 test (categorical data) or Student's t test (continuous).