Characteristics of subjects in the four study groups.
nD
pD
prD
prpD
value
(,471)
()
()
()
Age (mean, SD)
74.4 (7.1)
72.8 (6.2)
74.2 (6.3)
73.5 (6.9)
NS
Women
55.1
75.3
76.8
81.8
<0.001
Education
<0.001
Illiterate
22.3
22.4
27.6
10.6
Can read and write
45.3
41.2
45.9
37.9
Primary school
22.3
29.4
16.2
47.0
≥Secondary school
10.1
7.1
10.3
4.5
Hypertension
50.9
58.3
57.9
57.6
NS
Diabetes
18.4
22.4
27.2
25.8
<0.05
Heart disease
10.1
2.4
12.0
4.6
<0.05
Hypercholesterolemia
30.6
42.7
39.8
48.3
<0.005
Tobacco use1
38.8
22.2
22.0
18.8
<0.001
Stroke
4.9
3.5
7.0
12.1
<0.05
Dementia
6.0
7.1
9.7
13.6
<0.05
Dementia aetiology
<0.05
AD
74.7
20.0
61.1
88.9
DVC
11.5
60.0
11.1
11.1
Other aetiology
13.8
20.0
27.8
0.0
Data represent % unless otherwise indicated. This variable was missing in 447 subjects. nD: never depression; pD: past depression; prD: present depression; prpD: present and past depression; AD: Alzheimer's disease (without vascular component); DVC: dementia with vascular component; NS: statistically not significant ().
