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Does vascular burden contribute to the progression of mild cognitive impairment to dementia?

Francesca Clerici1, Barbara Caracciolo, Ilaria Cova

  • 1Center for Research and Treatment of Cognitive Dysfunctions, Institute of Clinical Neurology, Department of Biomedical and Clinical Sciences, Luigi Sacco Hospital, University of Milan, Milan, Italy. francesca.clerici1@unimi.it

Dementia and Geriatric Cognitive Disorders
|November 14, 2012
PubMed
Abstract

Insights

Vascular risk factors and diseases combined with white matter lesions significantly accelerate mild cognitive impairment progression to dementia and Alzheimer's disease.

Area of Science:

  • Neurology
  • Geriatrics
  • Vascular Medicine

Background:

  • Mild cognitive impairment (MCI) is a transitional stage between normal aging and dementia.
  • Understanding factors that predict progression from MCI to dementia, including Alzheimer's disease (AD), is crucial for early intervention.
  • Vascular risk factors (VRFs), vascular diseases (VDs), and white matter lesions (WMLs) are implicated in cognitive decline.

Purpose of the Study:

  • To investigate the combined contribution of VRFs, VDs, and WMLs to the progression of MCI to dementia and AD.
  • To quantify the risk associated with specific combinations of vascular burden and WMLs.

Main Methods:

  • A cohort of 245 MCI subjects (mean age 74.09 years) was followed for an average of 2.4 years.
  • VRFs and VDs were assessed using the Hachinski Ischemic Score and Framingham Stroke Risk Profile.
  • WMLs were graded using the Age-Related White Matter Changes Scale.

Main Results:

  • Over half (52.6%) of MCI subjects progressed to dementia, with 87 cases of AD.
  • Hypertension with deep WMLs increased dementia risk 1.8-fold.
  • Deep WMLs combined with high Hachinski scores (≥4) significantly elevated dementia (3.5-fold) and AD (3.8-fold) risk.
  • Combined WMLs and high Framingham scores (≥14) nearly doubled dementia risk (HR=1.9).

Conclusions:

  • The presence of WMLs alongside VRFs and VDs accelerates the progression from MCI to dementia and AD.
  • Identifying individuals with combined vascular burden and WMLs is critical for predicting rapid cognitive decline.

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