Variables | Without blood sample N = 408 | With blood sample N = 2520 | P-value (T-test with F-value, or chi-squared test) |
---|---|---|---|
Age in years (mean/sd) Missing values | 75.4 (7.2) 0 | 75.0 (7.0) 7 | F = 2.4, p = 0.27 |
Male sex (n/%) | 159 (39.0%) | 866 (34.4%) | X2 = 3.3, 1 df, p = 0.07 |
Ethnic identity | Â | Â | X2 = 1.9, 2 df, p = 0.39 |
'White' | 77 (69.4%) | 1674 (71.9%) | Â |
'Mixed' | 17 (15.3%) | 260 (11.2%) | Â |
'Black' | 17 (15.3%) | 395 (17.0%) | Â |
Missing values | 97 | 191 | Â |
Dementia (n/%) | 47 (11.5%) | 273 (10.8%) | X2 = 0.2, 1 df, p = 0.68 |
ICD depressive episode (n/%) | 19 (4.7%) | 125 (5.0%) | X2 = 0.1, 1 df, p = 0.79 |
Stroke (n/%) | 35 (8.6%) | 194 (7.7%) | X2 = 0.4, 1 df, p = 0.53 |
Missing values | 2 | 7 | Â |
Diabetes (n/%) | 71 (17.5%) | 471 (18.8%) | X2 = 0.4, 1 df, p = 0.53 |
Missing values | 2 | 14 | Â |
Hypertension (n/%) | 295 (72.3%) | 1841 (73.1%) | X2 = 0.1, 1 df, p = 0.75 |
Smoking (n/%) | 176 (43.2%) | 1141 (45.4%) | X2 = 0.7, 1 df, p = 0.41 |
Missing values | 1 | 8 | Â |
Family history of dementia (n/%) | 75 (18.5%) | 473 (18.8%) | X2 = 0.0, 1 df, p = 0.86 |
Missing values | 2 | 8 | Â |