Transcript CSHA Follow

The Prevalence of Dementia
1991 Baseline Study
Canadian Study
of Health and Aging
CSHA Study Centres
1000 kms.
Canadian Study
of Health and Aging
Prevalence of Dementia
Canada 1991-92
Rate per 1,000
400
350
300
250
Women
Men
Total
200
150
100
50
0
65-74
75-84
85 +
Source: Can Med Assoc J 1994;150:899-913
Canadian Study
of Health and Aging
Estimated Numbers of Canadians,
65+, with Dementia, 1991
100,000
90,000
80,000
70,000
60,000
50,000
40,000
30,000
20,000
10,000
0
Male
Female
Community
Institution
Source: Can Med Assoc J 1994;150:899-913
Canadian Study
of Health and Aging
Prevalence of Cognitive Disorder
by severity and gender (Canada, 1991)
Cognitively
normal
Cognitively
impaired;
not dementia
Dementia
Mild
Mod. Severe
Male %
72.6
21.3
2.1
2.6
1.4
Female %
77.1
13.5
2.4
3.6
3.5
M+F %
75.2
16.8
2.3
3.1
2.6
Source: Lancet 1997;349:1793
Canadian Study
of Health and Aging
More on the Prevalence of Dementia
• Prevalence continues to rise beyond age 85; by 105 years of
age almost 85% of people have dementia (Ebly et al., 1994)
• Hogan et al. (1996) described physiologic changes as
dementia progresses; these are similar for AD and vascular
dementia.
• About half of those with dementia live in the community
and half in institutions (CSHA, 1994)
• For almost two-thirds of those with dementia in the
community, their dementia has not been formally diagnosed
(Sternberg et al., 2000)
Canadian Study
of Health and Aging
Background:
Projected Prevalence of Dementia (x 1,000)
Canada, 1991 - 2031
800
All Dementias
700
600
500
AD
400
300
x3
x2
200
Vascular
100
0
1991
2001
2011
2021
2031
Source: CMAJ 1994; 150: 899-913
Canadian Study
of Health and Aging
The Impact of Demographic Changes on
Annual Incidence of Dementia in Canada
Numbers
of cases
150,000
100,000
50,000
2011
2001
0
65-69
70-74
75-79
80-84
85+
All
ages
1991
Note: this chart assumes constant age-sex prevalence
rates for dementia, and shows the impact of the growth
in the elderly population on numbers of people with dementia
Canadian Study
of Health and Aging