Midlife vascular risk factors and risk of incident dementia: Longitudinal cohort and Mendelian randomization analyses in the UK Biobank

Rainer Malik, Marios K Georgakis, Julia Neitzel, Kristiina Rannikmäe, Michael Ewers, Sudha Seshadri, Cathie L M Sudlow, Martin Dichgans

Research output: Contribution to journalArticlepeer-review

Abstract

INTRODUCTION: Midlife clustering of vascular risk factors has been associated with late-life dementia, but causal effects of individual biological and lifestyle factors remain largely unknown.

METHODS: Among 229,976 individuals (mean follow-up 9 years), we explored whether midlife cardiovascular health measured by Life's Simple 7 (LS7) is associated with incident all-cause dementia and whether the individual components of the score are causally associated with dementia.

RESULTS: Adherence to the biological metrics of LS7 (blood pressure, cholesterol, glycemic status) was associated with lower incident dementia risk (hazard ratio = 0.93 per 1-point increase, 95% confidence interval [CI; 0.89-0.96]). In contrast, there was no association between the composite LS7 score and the lifestyle subscore (smoking, body mass index, diet, physical activity) and incident dementia. In Mendelian randomization analyses, genetically elevated blood pressure was associated with higher risk of dementia (odds ratio = 1.31 per one-standard deviation increase, 95% CI [1.05-1.60]).

DISCUSSION: These findings underscore the importance of blood pressure control in midlife to mitigate dementia risk.

Original languageEnglish
JournalAlzheimer's & Dementia
Early online date22 Mar 2021
DOIs
Publication statusE-pub ahead of print - 22 Mar 2021

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