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Free-Cog: Pragmatic Test Accuracy Study and Comparison with Mini-Addenbrooke's Cognitive Examination
1Cognitive Function Clinic, Walton Centre for Neurology and Neurosurgery, Liverpool, United Kingdom, A.J.Larner@thewaltoncentre.nhs.uk.
Dementia and Geriatric Cognitive Disorders
|July 18, 2019
Summary
Free-Cog effectively screens for dementia by assessing both cognitive and functional abilities. While accurate for dementia, it is less sensitive than MACE for mild cognitive impairment (MCI) detection.
Area of Science:
- Neurology
- Geriatrics
- Psychiatry
Background:
- Dementia diagnosis typically requires assessing both cognitive and functional deficits.
- Existing screening tools often focus solely on cognitive impairments.
- Free-Cog is a novel screening instrument designed to evaluate both cognitive and functional abilities.
Purpose of the Study:
- To evaluate the accuracy of the Free-Cog screening tool in a secondary care setting.
- To compare the diagnostic performance of Free-Cog with the Mini-Addenbrooke's Cognitive Examination (MACE).
- To assess Free-Cog's utility in identifying dementia and mild cognitive impairment (MCI).
Main Methods:
- A pragmatic test accuracy study was conducted on 141 consecutive patients.
- Free-Cog performance was compared against MACE for dementia and MCI diagnosis.
- Data collected from patients in a secondary care setting over one year.
Main Results:
- Both Free-Cog and MACE demonstrated high sensitivity and were easy to use for dementia screening.
- Free-Cog showed higher specificity than MACE for dementia diagnosis.
- For MCI, Free-Cog had lower sensitivity (0.58) but higher specificity (0.81) compared to MACE (sensitivity 0.91, specificity 0.35).
Conclusions:
- Free-Cog is an acceptable and accurate screening tool for dementia in cognitive disorder clinics.
- Free-Cog demonstrates strong performance for dementia detection.
- Free-Cog appears less sensitive than MACE for identifying mild cognitive impairment (MCI).