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Prevalence and co-occurrence of dementia risk factors in Denmark: A nationwide study

Janbek, Janet; Laursen, Thomas Munk; Jørgensen, Kasper; Jensen, Martin Mejlby; Eliasen, Marie Holm; Christensen, Anne Illemann; Walsh, Sebastian; ... Waldemar, Gunhild; + view all (2025) Prevalence and co-occurrence of dementia risk factors in Denmark: A nationwide study. The Journal of Prevention of Alzheimer's Disease , Article 100365. 10.1016/j.tjpad.2025.100365. (In press). Green open access

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Abstract

Background: The clustering of dementia risk factors is common and has implications for policies targeting risk reduction. Objectives: To estimate the prevalence of 16 dementia risk factors and their co-occurrence. Design: Cross-sectional based on a closed cohort on 1 January 2022 with nationwide data on risk factors from 1969/1977. Setting: Denmark Participants: Whole population; closed cohort of individuals ≥65 years on 1 January 2022, and a subpopulation of responders in the 2010/2013 Danish National Health Survey. Intervention (exposures): Sixteen dementia risk factors: hypertension, cardiovascular disease, diabetes, hypercholesterolemia, obesity, smoking, alcohol, physical inactivity, depression, hearing loss, vision impairment, traumatic brain injury, sleep disorders, hospital-diagnosed infections, social isolation, and low education. Measurements: Period and point prevalence proportions of the dementia risk factors and of all possible combinations of factors (those occurring in ≥10 % of individuals). The prevalence estimates reflect a population-level view of persons who have experienced, were diagnosed, or were treated for the risk factors assessed. Results: In the whole population (N = 1,214,286) and the subpopulation (N = 88,565), 5 % had no risk factors, 12 % had only one, and 82 % had multiple. Hypertension was the most prevalent (57 %), and vision impairment the least (2 %). Men, individuals ≥85 years, and those with low education had the highest prevalence of risk factors (with exceptions). Conclusions: Clustering of risk factors is very common, and findings emphasize the need to focus on multidomain interventions for dementia risk reduction that account for the clustering of risk.

Type: Article
Title: Prevalence and co-occurrence of dementia risk factors in Denmark: A nationwide study
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.tjpad.2025.100365
Publisher version: https://doi.org/10.1016/j.tjpad.2025.100365
Language: English
Additional information: © 2025 The Author(s). Published by Elsevier Masson SAS on behalf of SERDI Publisher. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Keywords: Dementia, Risk factors, Co-occurrence, Nationwide, Population-based
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Division of Psychiatry
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Division of Psychiatry > Mental Health of Older People
URI: https://discovery.ucl.ac.uk/id/eprint/10212993
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