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A Machine Learning Approach to Design an Efficient Selective Screening of Mild Cognitive Impairment
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Higher risk of progression to dementia in mild cognitive impairment cases who revert to normal

Rosebud O Roberts1, David S Knopman, Michelle M Mielke

  • 1From the Divisions of Epidemiology (R.O.R., M.M.M., Y.E.G., W.A.R., R.C.P) and Biomedical Statistics and Informatics (R.H.C. V.S.P., T.J.H.C.), Department of Health Sciences Research; Department of Neurology (R.O.R., D.S.K., B.F.B., R.C.P.); Department of Psychiatry and Psychology (R.J.I.); and Division of Primary Care Internal Medicine, Department of Internal Medicine (E.G.T), Mayo Clinic, Rochester, MN; and Departments of Psychiatry & Psychology and Neurology (Y.E.G.), Mayo Clinic, Scottsdale, AZ.

Neurology
|December 20, 2013
PubMed
Abstract

Insights

Individuals with mild cognitive impairment (MCI) have a high risk of progressing to dementia, even if they temporarily revert to cognitively normal (CN) status. Early MCI diagnosis is a significant predictor of future dementia risk.

Area of Science:

  • Neurology
  • Geriatrics
  • Cognitive Science

Background:

  • Mild cognitive impairment (MCI) is a transitional stage between normal cognition and dementia.
  • Understanding the progression and reversion rates of MCI is crucial for predicting dementia risk.

Purpose of the Study:

  • To determine the rates of progression from mild cognitive impairment (MCI) to dementia.
  • To estimate the rates of reversion from MCI to cognitively normal (CN) status.
  • To assess the long-term prognostic value of MCI diagnosis.

Main Methods:

  • Prospective population-based cohort study (Mayo Clinic Study of Aging).
  • Inclusion of 534 participants aged 70 years and older.
  • Regular evaluations every 15 months to track cognitive status changes.

Main Results:

  • Over 5.1 years, 28.7% of MCI participants progressed to dementia (71.3 per 1,000 person-years).
  • 38% of MCI participants reverted to CN, but 65% of these later developed MCI or dementia.
  • Factors reducing reversion risk included APOE ε4 allele, higher Clinical Dementia Rating Scale-Sum of Boxes, poorer cognitive function, amnestic MCI, and multidomain MCI.

Conclusions:

  • MCI diagnosis, regardless of reversion to CN, indicates a significantly elevated risk of future dementia.
  • MCI status holds prognostic value for predicting dementia development.
  • Interventions targeting MCI may be beneficial in delaying or preventing dementia progression.

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