Cited by 38Cerebrovascular and genetic disordersDementia and Cognitive Impairment ResearchIntracerebral and Subarachnoid Hemorrhage Research

Contribution of Conventional Cardiovascular Risk Factors to Brain White Matter Hyperintensities

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Koohi, Fatemeh, Harshfield, Eric L., Markus, Hugh S.·2023·Journal of the American Heart Association

Abstract

Background: White matter hyperintensities (WMHs) are a major risk factor for stroke and dementia, but their pathogenesis is incompletely understood. It has been debated how much risk is accounted for by conventional cardiovascular risk factors (CVRFs), and this has major implications as to how effective a preventative strategy targeting these risk factors will be. Methods and Results: We included 41 626 UK Biobank participants (47.2% men), with a mean age of 55 years (SD, 7.5 years), who underwent brain magnetic resonance imaging at the first imaging assessment beginning in 2014. The relationships among CVRFs, cardiovascular conditions, and WMH volume as a percentage of total brain volume were examined using correlations and structural equation models. Only 32% of the variance in WMH volume was explained by measures of CVRFs, sex, and age, of which age accounted for 16%. CVRFs combined accounted for ≈15% of the variance. However, a large portion of the variance (well over 60%) remains unexplained. Of the individual CVRFs, blood pressure parameters together accounted for ≈10.5% of the total variance (diagnosis of hypertension, 4.4%; systolic blood pressure, 4.4%; and diastolic blood pressure, 1.7%). The variance explained by most individual CVRFs declined with age. Conclusions: Our findings suggest the presence of other vascular and nonvascular factors underlying the development of WMHs. Although they emphasize the importance of modification of conventional CVRFs, particularly hypertension, they highlight the need to better understand risk factors underlying the considerable unexplained variance in WMHs if we are to develop better preventative approaches.

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Authors
Koohi, F., Harshfield, E. L., & Markus, H. S.
Affiliations
University of Cambridge (GB)
Corresponding author
Koohi, Fatemeh
Venue
Journal of the American Heart Association
Published
2023-07-18
Volume
12
Issue
14
Pages
e030676-e030676
ISSN
2047-9980 (ISSN-L)
OpenAlex
W4383621477
Cited by
38
References
36
Citations by year
2026: 11 · 2025: 15 · 2024: 9 · 2023: 3
FWCI
6.46
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Journal of the American Heart Association (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Apollo (University of Cambridge) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institute for Health and Care Research ((NIHR203312)
  • British Heart Foundation (RE/18/1/34212, RG/F/22/110052)
  • University of Cambridge
  • Cambridge University Hospitals
Topics
  • Health Sciences › Medicine › Neurology › Cerebrovascular and genetic disorders
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Neurology › Intracerebral and Subarachnoid Hemorrhage Research
Keywords
white matter hyperintensities, cardiovascular risk factors, hypertension, blood pressure, stroke risk, dementia risk, vascular risk factors, unexplained variance, brain MRI, UK Biobank
MeSH terms
Heart Disease Risk Factors, Brain, Cardiovascular Diseases, Female, Humans, Hypertension, Magnetic Resonance Imaging, Male, Middle Aged, Risk Factors, White Matter

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