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Mental status testing in the elderly nursing home population

J D Nadler1, N R Relkin, M S Cohen

  • 1Starr Program for Neurogeriatric Studies, Cornell University Medical Center, New York, New York, USA.

Journal of Geriatric Psychiatry and Neurology
|July 1, 1995
PubMed
Summary

Cognitive screening tools like the Mini-Mental State Exam (MMSE) and Modified Mini-Mental State Exam (3MS) show high sensitivity but low specificity for dementia in nursing homes. Revised cutoffs are needed for accurate dementia detection in the oldest-old.

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Area of Science:

  • Geriatric Medicine
  • Neuroscience
  • Psychometrics

Background:

  • Cognitive screening instruments are crucial for identifying dementia in elderly populations.
  • Nursing home residents present unique challenges for accurate cognitive assessment.
  • Existing screening tools may require adjustments for specific geriatric sub-populations.

Purpose of the Study:

  • To evaluate the clinical utility of the Mini-Mental State Exam (MMSE), Modified Mini-Mental State Exam (3MS), and Dementia Rating Scale (DRS) in detecting dementia among nursing home residents.
  • To determine the sensitivity, specificity, and predictive values of these instruments in this population.
  • To identify factors associated with misclassification and suggest optimal cutoff values.

Main Methods:

  • A cohort of 120 nursing home residents (mean age 87.9) underwent assessment with the MMSE and 3MS.

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  • The majority also completed the DRS.
  • Dementia diagnosis was based on DSM-III-R criteria by geriatric medicine specialists.

    • Main Results:

    • The 3MS, MMSE, and DRS demonstrated high sensitivity (82–100%) but low specificity (33–52%) for dementia detection.
    • Positive predictive values ranged from 52% to 61%, and negative predictive values from 77% to 100%.
    • Advanced age, lower education, and depression history were linked to misclassification of non-demented individuals.

    Conclusions:

    • The 3MS, MMSE, and DRS show comparable classification accuracy for dementia in nursing home residents.
    • The oldest-old with lower education and depression history are at higher risk for misclassification.
    • Revised cutoff values are recommended for these instruments when used in nursing home settings and for the oldest-old population.