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Glomerular hyperfiltration is associated with dementia: A nationwide population-based study.

Min Woo Kang1,2, Sehoon Park1,2,3, Soojin Lee1,2

  • 1Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.

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Summary

Glomerular hyperfiltration, a sign of kidney dysfunction, is linked to an increased risk of developing dementia, particularly vascular dementia. Individuals with hyperfiltration require closer monitoring for cognitive decline.

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Area of Science:

  • Nephrology and Neurology
  • Vascular Health and Cognitive Function

Background:

  • Glomerular hyperfiltration may indicate endothelial dysfunction, a potential precursor to vascular dementia.
  • Endothelial dysfunction can impair cerebral blood flow, contributing to cognitive decline.

Purpose of the Study:

  • To investigate the association between glomerular hyperfiltration and the risk of developing dementia.
  • To determine if glomerular hyperfiltration predicts the onset of all-cause dementia, Alzheimer's dementia, or vascular dementia.

Main Methods:

  • A large cohort study using the Korean National Health Information Database (n=2,244,582) of individuals aged ≥45 years.
  • Glomerular hyperfiltration was defined as estimated glomerular filtration rate (eGFR) at or above the 95th percentile within sex and age-specific groups.
  • Multivariable Cox proportional hazards models analyzed the risk of dementia outcomes.

Main Results:

  • Glomerular hyperfiltration was associated with a significantly higher risk of all types of dementia (adjusted HR 1.09) and vascular dementia (adjusted HR 1.33).
  • No statistically significant association was found between glomerular hyperfiltration and Alzheimer's dementia.

Conclusions:

  • Glomerular hyperfiltration may serve as an indicator for increased dementia risk.
  • Individuals identified with glomerular hyperfiltration warrant closer surveillance for early signs of dementia.