Memory testing in dementia: how much is enough?

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).
• 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.