• Revista médica de Chile · Sep 2020

    [Psychometric properties of the Addenbrooke's Cognitive Examination III (ACE-III) for the detection of dementia].

    • Óscar Véliz García, Carlos Calderón Carvajal, and Christian Beyle Sandoval.
    • Escuela de Psicología, Facultad de Humanidades, Universidad Católica del Norte, Antofagasta, Chile.
    • Rev Med Chil. 2020 Sep 1; 148 (9): 1279-1288.

    BackgroundThe Addenbrooke's Cognitive Examination III (ACE-III) is widely used for evaluation of dementia.AimTo assess the psychometric properties of ACE-III, analyzing its factor structure, its reliability (from an Item Response Theory [TRI] model) and its diagnostic usefulness.Material And MethodsWe studied 1101 older people without cognitive impairment and 63 currently having a diagnosis and receiving treatment for dementia.ResultsThe presence of two factors for the Attention subscale (Orientation and Attention, separately) was suggested. The factorial analysis showed adequate adjustment in all the subscales, except for the new Attention subscale. In the TRI analysis, the Attention subscale presented a greater number of items with lack of fit compared to the other subscales. Using a proposed threshold of 66 points or less to identify cognitive impairment related to dementia, a sensitivity of 0.97 and specificity of 0.81 was obtained.ConclusionsACE-III is a valid, reliable, and useful measure for the clinical detection of dementia. The combined use of Orientation and Memory subscales is proposed as an alternative and time-saving ACE-III indicator.

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