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Memory testing in dementia: how much is enough?

D S Derrer1, D B Howieson, E A Mueller

  • 1Veterans Affairs Medical Center, Portland, Oregon, USA.

Journal of Geriatric Psychiatry and Neurology
|April 3, 2001
PubMed
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This study found that specific memory tests, like Word List Acquisition, effectively distinguish mild dementia from healthy individuals. Combining three key memory measures achieved over 97% accuracy in diagnosis.

Area of Science:

  • Neurology
  • Psychology
  • Gerontology

Background:

  • Early diagnosis of mild dementia is crucial for timely intervention.
  • Several memory assessment tools are available, but their comparative diagnostic utility varies.
  • Differentiating mild dementia from normal aging requires sensitive and specific measures.

Purpose of the Study:

  • To evaluate the diagnostic accuracy of individual memory measures in identifying mild dementia.
  • To determine the combined predictive power of selected memory tests in distinguishing mild dementia from healthy controls.
  • To identify the most effective memory tests for diagnosing mild dementia.

Main Methods:

  • Analysis of eight established memory measures, including Word List Acquisition, Wechsler Memory Scale-Revised (WMS-R) Logical Memory and Visual Reproduction, Neurobehavioral Cognitive Status Examination (NCSE), and Mini-Mental State Examination (MMSE).

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  • Logistic regression analysis was employed to assess the combined predictive power of these measures.
  • Sensitivity and specificity were calculated for the most accurate diagnostic combinations.

    • Main Results:

    • Individually, the analyzed memory tests demonstrated moderate power in differentiating mild dementia from healthy controls.
    • A combination of Word List Acquisition, WMS-R Logical Memory II, and WMS-R Visual Reproduction II achieved 97.26% accuracy (100% sensitivity, 94.59% specificity).
    • Word List Acquisition alone showed high diagnostic accuracy (92%).

    Conclusions:

    • Memory tests are valuable tools for diagnosing mild dementia.
    • The combination of Word List Acquisition, WMS-R Logical Memory II, and WMS-R Visual Reproduction II offers a highly accurate method for diagnosing mild dementia.
    • The Word List Acquisition test is a brief yet potent measure for identifying mild dementia.