The Mini-Addenbrooke’s Cognitive Examination (M-ACE) as a brief cognitive screening instrument in Mild Cognitive Impairment and mild Alzheimer’s disease

• Autor(a) principal: Miranda,Diane da Costa
• Data de Publicação: 2018
• Outros Autores: Brucki,Sonia Maria Dozzi, Yassuda,Mônica Sanches
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Dementia & Neuropsychologia
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-57642018000400368
• topic: dementia; cognition; Alzheimer’s disease; cognitive dysfunction; neuropsychological tests; Brazil

ABSTRACT The Mini-Addenbrooke’s Cognitive Examination (M-ACE) is a brief cognitive screening test that evaluates four main cognitive domains (orientation, memory, language and visuospatial function) with a maximum score of 30 points and administration time of five minutes. Objective: To assess the performance of healthy elderly, MCI patients and mild AD patients using the Brazilian version of the M-ACE. Methods: The test was applied to a group of 36 Mild Cognitive Impairment (MCI), 23 mild Alzheimer’s Disease (AD) and 25 cognitive healthy elderly. All participants were aged ≥60 years. Results: The M-ACE displayed high internal consistency (Cronbach alpha >0.8; 95% CI 0.7-0.8) and proved effective for differentiating the AD group from MCI and control groups, providing superior accuracy than the MMSE (the cut-off point of 20 points had the highest sensitivity and specificity – 95.6% and 90.16% respectively, with a high area under the curve – AUC=0.8; 95% CI 0.7-0.9). Performance on the M-ACE was strongly correlated with that of the MMSE and Functional Activities Questionnaire (FAQ). The M-ACE was not accurate in discriminating MCI from control subjects. Conclusion: The M-ACE is a brief screening test which provided high accuracy for diagnosing AD in this sample. The suggested cut-off point in this study was 20 points for AD.