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Cognitive Change Questionnaire as a method for cognitive impairment screening.

Antonio Eduardo Damin1,2, Ricardo Nitrini1,2, Sonia Maria Dozzi Brucki1,2

  • 1MD, PhD, Behavioral and Cognitive Neurology Unit, Department of Neurology, School of Medicine, University of São Paulo (FMUSP), São Paulo SP, Brazil.

Dementia & Neuropsychologia
|December 8, 2017
PubMed
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The new 8-item Cognitive Change Questionnaire (CCQ8) effectively screens for Mild Cognitive Impairment (MCI) and dementia. This brief tool accurately differentiates cognitive impairment in individuals.

Area of Science:

  • Neurology
  • Psychometrics
  • Geriatrics

Background:

  • The Cognitive Change Questionnaire (CCQ) is an established tool for assessing cognitive changes.
  • There is a need for brief, validated instruments for cognitive screening in diverse populations.
  • The original 22-item CCQ (CCQ22) was developed for use in Brazil.

Purpose of the Study:

  • To determine if the CCQ can distinguish between cognitively normal individuals, those with Mild Cognitive Impairment (MCI), and those with early dementia.
  • To develop a shorter version of the CCQ (CCQ8) with fewer items while maintaining diagnostic accuracy.

Main Methods:

  • Evaluated 123 participants: 42 healthy controls, 40 with MCI, and 41 with mild dementia.
  • Utilized cognitive tests and informant-based questionnaires for assessment.
Keywords:
cognitive assessmentdementiadiagnosismild cognitive impairment

Related Experiment Videos

  • Developed the CCQ22 by selecting expert-recommended questions for early dementia screening.

    • Main Results:

    • The CCQ22 demonstrated good accuracy in differentiating between study groups.
    • Statistical analysis identified the eight most discriminating questions, forming the CCQ8.
    • The CCQ8 showed high accuracy (AUC ROC), strong correlation with diagnosis (r=0.861), and good internal consistency (Cronbach's α=0.876).

    Conclusions:

    • The 8-item Cognitive Change Questionnaire (CCQ8) is a validated, brief instrument.
    • CCQ8 accurately differentiates individuals with and without cognitive impairment.
    • This tool is suitable for cognitive screening in clinical settings.