Anxiety as a risk factor of Alzheimer's disease and vascular dementia.

Published on Nov 1, 2018in British Journal of Psychiatry7.85
· DOI :10.1192/BJP.2018.173
Eva Becker1
Estimated H-index: 1
(University of Freiburg),
Claudia Lorena Orellana Rios1
Estimated H-index: 1
(University of Freiburg)
+ 3 AuthorsMartin Boeker19
Estimated H-index: 19
(University of Freiburg)
Background The aetiology of dementia is not yet fully understood. Stress can have a damaging effect on brain health. The prognostic effect of anxiety is still unclear regarding Alzheimer's disease as well as vascular dementia. Aims To explore the association between anxiety and future dementia. Method Medline, PsycINFO, CINAHL, Web of Science and ALOIS were searched for publications up to 12 January 2018. Longitudinal studies with a follow-up of at least 2 years were included, if the trait or state anxiety had been assessed at baseline. Studies with cognitive impairment at baseline were not included. We used a random effects model to calculate the pooled time to Alzheimer's disease and incidence of vascular dementia. Results Anxiety predicts risk of Alzheimer's disease ( n = 26 193 out of seven studies, hazard ratio1.53, 95% CI 1.16–2.01, P n = 4916 out of two studies, odds ratio1.88, 95% CI 1.05–3.36, P n = 14 110 out of six studies, hazard ratio 1.35, 95% CI 1.08–1.70, P Conclusions Anxiety is a risk factor for both types of dementia. The temporal and functional relation between anxiety and dementia needs investigation in future studies. The protective value of treating anxiety should be explored further. Declaration of interest None.
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