To the top

Page Manager: Webmaster
Last update: 9/11/2012 3:13 PM

Tell a friend about this page
Print version

Decreasing prevalence of … - University of Gothenburg, Sweden Till startsida
To content Read more about how we use cookies on

Decreasing prevalence of dementia in 85-year olds examined 22 years apart: the influence of education and stroke

Journal article
Authors Ingmar Skoog
Anne Börjesson-Hanson
Silke Kern
Lena Johansson
Hanna Falk
Robert Sigström
Svante Östling
Published in Scientific Reports
Volume 7
ISSN 2045-2322
Publication year 2017
Published at Institute of Neuroscience and Physiology
Language en
Keywords alzheimers-disease, united-states, cognitive impairment, risk-factors, trends, mortality, population, time, metaanalysis, survival
Subject categories Neurosciences


Individuals aged 80 years and older constitute the fastest growing segment of the population worldwide, leading to an expected increase in dementia cases. Education level and treatment of vascular risk factors has increased during the last decades. We examined whether this has influenced the prevalence of dementia according to DSM-III-R using population-based samples of 85-year-olds (N = 1065) examined with identical methods 1986-87 and 2008-10. The prevalence of dementia was 29.8% in 1986-87 and 21.7% in 2008-10 (OR 0.66; 95%-CI: 0.50-0.86). The decline was mainly observed for vascular dementia. The proportion with more than basic education (25.2% and 57.7%), and the prevalence of stroke (20% and 30%) increased, but the odds ratio for dementia with stroke decreased from 4.3 to 1.8 (interaction stroke*birth cohort; p = 0.008). In a logistic regression, education (OR 0.70; 95%-CI 0.51-0.96), stroke (OR 3.78; 95%-CI 2.28-6.29), interaction stroke*birth cohort (OR 0.50; 95%CI 0.26-0.97), but not birth cohort (OR 0.98; 95%-CI 0.68-1.41), were related to prevalence of dementia. Thus, the decline in dementia prevalence was mainly explained by higher education and lower odds for dementia with stroke in later born birth cohorts. The findings may be related to an increased cognitive reserve and better treatment of stroke in later-born cohorts.

Page Manager: Webmaster|Last update: 9/11/2012

The University of Gothenburg uses cookies to provide you with the best possible user experience. By continuing on this website, you approve of our use of cookies.  What are cookies?