Table 1 Baseline sample characteristics of ELSA participants
Total sample N = 6784 | Dementia cases N = 271 (4.0%) | Controls N = 6513 (96.0%) | Test statistics | |||
|---|---|---|---|---|---|---|
N (%) / Mean (SD) | N (%) / Mean (SD) | N (%) / Mean (SD) | t/x2 | DF | p-value | |
Baseline sample characteristics | ||||||
Age at baseline (years) | 64.5 (9.3) | 73.2 (8.6) | 64.2 (9.2) | −15.95 | 6782 | <.001 |
Men | 3135 (46.2) | 117 (43.2) | 3018 (46.3) | 1.05 | 1 | .31 |
APOE-ε4 present | 1710 (25.2) | 109 (40.2) | 1601 (24.6) | 33.76 | 1 | <.001 |
Not married | 4685 (69.1) | 162 (59.8) | 4523 (69.5) | 11.38 | 1 | .001 |
Currently a smoker | 1068 (15.7) | 40 (14.8) | 1028 (15.8) | 0.21 | 1 | .65 |
Presence of any lifelong limiting conditions | 2114 (31.2) | 119 (43.9) | 1995 (30.6) | 21.39 | 1 | <.001 |
< 5 portions of fruit and vegetable intake daily | 3627 (53.5) | 175 (64.6) | 3452 (53.0) | 14.01 | 1 | <.001 |