Characteristics of the study population (% prevalence and mean values)
| Participant characteristics | N (%)/M (SD) | Min | Max |
|---|---|---|---|
| Age | 72.5 (0.7) | 70.9 | 74.1 |
| Sex | |||
| Male | 352 (51.5) | ||
| Female | 331 (48.5) | ||
| Presence or history of disease | |||
| Hypertension | 322 (47.1) | ||
| Diabetes | 62 (9.1) | ||
| CVD | 189 (27.7) | ||
| Stroke | 38 (5.6) | ||
| Smoking status | |||
| Current smoker | 54 (7.9) | ||
| Ex-smoker | 308 (45.1) | ||
| Never smoked | 321 (47.0) | ||
| APOE status | |||
| e4 allele present | 184 (26.9) | ||
| No e4 allele | 465 (68.1) | ||
| Visual acuity (left) | 0.4 (0.3) | −0.1 | 1.3 |
| Visual acuity (right) | 0.4 (0.3) | −0.1 | 1.4 |
| HADS depression | 2.5 (2.1) | 0 | 13 |
| Years of education | 10.8 (1.1) | 9 | 14 |
| Social class | 2.3 (0.9) | ||
| I | 134 (19.6) | ||
| II | 261 (38.2) | ||
| IIIN | 142 (20.8) | ||
| IIIM | 109 (16.0) | ||
| IV | 22 (3.2) | ||
| V | 5 (0.7) | ||
Visual acuity in logMAR units. Social classes are categorised as follows: I (professional occupations); II (managerial and technical occupations); IIIN (non-manual skilled occupations); IIIM (manual skilled occupations); IV (partly skilled occupations); V (unskilled occupations).
APOE, apolipoprotein E; CVD, cardiovascular disease; HADS, Hospital Anxiety and Depression Scale.