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Epidemiology of Dementia in Canada: Information from the Canadian Study of Health and Aging
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Prevalence of Dementia Canada 1991-92 Rate per 1,000 Source: Can Med Assoc J 1994;150:899-913
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Prevalence of Cognitive Disorder by severity and gender, ages 65+ Cognitively Cog. Dementia normal Impaired Mild Mod.Severe Male %72.6 21.3 2.12.6 1.4 Female %77.1 13.5 2.43.6 3.5 M + F %75.2 16.8 2.33.1 2.6 Source: Lancet 1997;349:1793
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Prevalence of Cognitive Disorder by severity and age Cognitively Impaired Dementia normal Mild Mod.Severe 65-74 %86.6 11.0 1.00.9 0.5 75-84 %64.7 24.0 3.44.6 3.2 85+ %35.0 30.3 7.2 12.914.6
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Estimated Numbers of Canadians, 65+, with Dementia, 1991 Source: Can Med Assoc J 1994;150:899-913
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Projected Prevalence of Dementia (x 1,000) Canada, 1991 - 2031 All Dementias AD Vascular x 2 x 3
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Age-Specific Incidence of Dementia in Canada, per thousand (whole population) Women Men Source: Neurology 2000; 55: 66-73
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Annual Numbers of New Cases of Dementia Canada, 1991 65 - 74 85+ 75 - 84 All Ages: 60,150 Source: Neurology 2000; 55: 66-73
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Probability of Becoming Demented Canada, 1991 Women Men Undemented at age % probability
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Annual Incidence of Dementia in selected studies, by age, per thousand (whole population) CSHA Rochester Turku Bordeaux Framigham New York Mannheim Rotterdam Kungsholmen
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Age-Specific Incidence of Alzheimer’s Disease, per thousand CSHA E. Boston Bordeaux Baltimore Lund Framingham Rotterdam
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Age-Specific Incidence of Alzheimer’s Disease, per thousand Canada
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CSHA Incidence of Alzheimer’s Disease, per thousand (log scale)
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Expectation of Life With and Without Dementia: Canadian Women Age Years undemented demented
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Expectation of Life With and Without Dementia: Canadian Men Age Years undemented demented
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Age-adjusted Mortality Ratios Mortality Ratio ResidenceCognitive statusWomenMen CommunityNormal1 1 Impaired2.171.95 Demented2.672.84 InstitutionNormal3.062.11 Impaired3.523.09 Demented6.035.02 (reference group) Source: Can. J. Public Health 1997;88:303
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Progression of Dementia: Survival by Age Category years of survival
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Net Annual Costs of Dementia, 1991 cost perNo. ofAnnual net Sourcepatient, $patientscost x 1,000$ Community10,100123,9001,250,900 - paid services 4,970123,900 615,200 - unpaid services 5,130123,900 635,700 Institutions19,100114,0002,177,500 Drugs 240252,600 60,600 Hospital 0252,600 0 Diagnosis 250 54,100 13,500 People < 65 yrs 28,100 389,200 Total3,901,500 Source: CanMedAssocJ 1994;151:1457-64
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Dementia and Functional Ability CommunityInstitutions NormalDemented NormalDemented % % % % Good function 65.8 6.6 7.1 0.0 Mild disability 20.2 14.8 10.8 0.3 Moderate 12.1 30.8 39.5 2.5 Severe 1.3 21.2 27.3 12.3 Total disability 0.6 26.5 15.3 84.9
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Risk Factors for AD (CSHA-1 Case-Control Study) One or more relatives with AD: O.R. 2.6One or more relatives with AD: O.R. 2.6 0-6 yrs education: O.R. 4.00-6 yrs education: O.R. 4.0 Occupational exposure to glues: O.R. 2.2Occupational exposure to glues: O.R. 2.2 Head injury: O.R. 1.7Head injury: O.R. 1.7 Arthritis: O.R. 0.5Arthritis: O.R. 0.5 Use of NSAID drugs: O.R. 0.5Use of NSAID drugs: O.R. 0.5 Age of onset for smokers 80 yrs; nonsmokers 84 yrs.Age of onset for smokers 80 yrs; nonsmokers 84 yrs. Source: Neurology 1994;44:2073-80
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Risk Factors for Alzheimer’s Disease (Cohort Study) OR 95% CI Any Apolipoprotein E4 3.3 2.0 – 5.4Any Apolipoprotein E4 3.3 2.0 – 5.4 0-8 yrs. education 1.9 1.3 - 2.90-8 yrs. education 1.9 1.3 - 2.9 Head injury 0.6 0.3 - 1.2Head injury 0.6 0.3 - 1.2 Family history of dementia1. 0 0.6 – 1.8Family history of dementia1. 0 0.6 – 1.8 Depression 2.8 1.3 - 6.1 Depression 2.8 1.3 - 6.1 Smoking 1.04 0.6 - 1.8 Smoking 1.04 0.6 - 1.8
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Risk Factors for Alzheimer’s Disease (continued) OR 95% CI Vigorous exercise x3 / wk 0.7 0.5 - 1.0Vigorous exercise x3 / wk 0.7 0.5 - 1.0 Use of NSAID drugs 0.7 0.4 – 1.0 Use of NSAID drugs 0.7 0.4 – 1.0 Ulcer 1.8 0.9 - 3.3Ulcer 1.8 0.9 - 3.3 History of hypertension 0.8 0.5 - 1.3History of hypertension 0.8 0.5 - 1.3
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