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Related Experiment Videos

Identifying dementia in the primary care practice.

P R Solomon1, M Brush, V Calvo

  • 1Department of Psychology, Williams College, Williamstown, Massachusetts 01267, USA. psolomon@williams.edu

International Psychogeriatrics
|March 27, 2001
PubMed
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The 7 Minute Screen effectively identifies probable Alzheimer's disease (AD) in primary care, showing high positive and negative predictive values. This tool aids in diagnosing cognitive impairment, potentially uncovering many undiagnosed AD cases.

Area of Science:

  • Gerontology
  • Neurology
  • Primary Care Medicine

Background:

  • Alzheimer's disease (AD) diagnosis in primary care is challenging.
  • Early identification of AD is crucial for timely intervention and management.
  • The 7 Minute Screen is a potential tool for AD screening in diverse clinical settings.

Purpose of the Study:

  • To evaluate the positive and negative predictive value of the 7 Minute Screen for probable Alzheimer's disease (AD) in a primary care setting.
  • To estimate the prevalence of undiagnosed AD patients within a typical primary care practice.
  • To assess the reliability and administration time of the 7 Minute Screen.

Main Methods:

  • 137 patients over 60 in a primary care practice were administered the 7 Minute Screen.

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  • Patients screening positive (n=13) and a sample screening negative (n=26) underwent full diagnostic evaluation.
  • Positive and negative predictive values were calculated against a criterion standard of clinical diagnosis.

    • Main Results:

    • The 7 Minute Screen identified 13 positive and 124 negative cases.
    • Of those screening positive, 10 were diagnosed with probable AD and 1 with mixed dementia.
    • Among those screening negative, 25 were cognitively normal and 1 had mild cognitive impairment.

    Conclusions:

    • The 7 Minute Screen demonstrated a 91% positive predictive value and 96% negative predictive value for identifying AD and other dementing disorders.
    • The findings suggest the 7 Minute Screen is a useful instrument for initiating diagnostic evaluation for dementia in primary care.
    • An estimated 75-100 undiagnosed AD patients may exist in a typical primary care practice, highlighting a significant gap in diagnosis.