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Related Experiment Videos

Abbreviated cognitive test for delirium

R P Hart1, A M Best, C N Sessler

  • 1Department of Psychiatry, Medical College of Virginia/Virginia Commonwealth University, Richmond 23298-00268, USA.

Journal of Psychosomatic Research
|October 23, 1997
PubMed
Summary
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A shorter version of the Cognitive Test for Delirium (CTD) accurately identifies intensive care unit (ICU) delirium. This abbreviated CTD is practical for clinicians, distinguishing delirium from other cognitive conditions.

Area of Science:

  • Neuroscience
  • Gerontology
  • Critical Care Medicine

Background:

  • Delirium is a common and serious condition in intensive care units (ICUs).
  • Accurate and practical diagnostic tools are needed for delirium identification in critical care settings.
  • The Cognitive Test for Delirium (CTD) was developed to aid in delirium diagnosis.

Purpose of the Study:

  • To validate an abbreviated version of the Cognitive Test for Delirium (CTD).
  • To assess the practicality and diagnostic accuracy of the abbreviated CTD in an ICU setting.

Main Methods:

  • Stepwise discriminant analyses were performed on the original validation sample of the CTD.
  • A reduced scoring method was developed using only two sub-scores: visual attention span and recognition memory for pictures.

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  • The abbreviated CTD's ability to discriminate delirium from dementia, schizophrenia, and depression was evaluated.

    • Main Results:

    • The abbreviated CTD, using a sum of visual attention span and recognition memory for pictures, demonstrated good reliability (coefficient alpha = 0.79).
    • This abbreviated score effectively discriminated delirium from dementia, schizophrenia, and depression (p < 0.0001).
    • It also differentiated delirium from moderate to severe dementia (p < 0.0002).

    Conclusions:

    • An abbreviated version of the CTD is a reliable and valid tool for identifying delirium in the ICU.
    • This shortened CTD is more practical for routine use by intensive care unit clinicians.
    • The abbreviated CTD aids in distinguishing delirium from other psychiatric and cognitive disorders.