Development of the Brazilian version of the Mini-Addenbrooke Cognitive Examination (M-ACE BR) to screen for cognitive impairment in older adults

Abstract

Background Age is the most important risk factor for develop dementia, and the recommendation is that older adults are cognitively tested to detect impairment in the initial stage for adequate treatment. The demand for the care of these older adults is great, drawing attention to the need for rapid tests, with good accuracy and simple application to identify cognitive impairment.

Objective To develop and validate the Brazilian Mini-Addenbrooke Cognitive Examination (M-ACE BR) as a short screening test for cognitive impairment in older adults.

Methods The M-ACE BR was developed using the Mokken scaling analysis in 352 participants (cognitively unimpaired [CU] = 232, cognitive impairment no dementia [CIND] = 82; and dementia = 38) and validated in an independent sample of 117 participants (CU = 25; CIND = 88; and dementia = 4).

Results The Mokken scaling analysis derived 9 items (spatial orientation, anterograde memory, retrograde memory, delayed recall, recognition [name and address], letter verbal fluency, repetition of 4 words, naming of 10 items, and comprehension) with a maximum score of 51 points and an average duration time of 7 minutes. The cut-off score ≤ 43/51 for CIND had a sensitivity of 59.09% and a specificity of 80%. For a screening test in which sensitivity is prioritized for further investigation, we suggest using a cutoff of ≤ 47 (sensitivity 85.23% and specificity 24%), maintaining a good positive predictive value (79.8%).

Conclusion The M-ACE BR is a brief and adequate instrument to detect cognitive impairment in older Brazilian adults. However, screening for CIND and for different educational levels should be further explored.

Resumo

Antecedentes A idade é o fator de risco mais importante para o desenvolvimento de demência, e a recomendação é que os idosos sejam testados cognitivamente para detectar comprometimento na fase inicial para o tratamento adequado. A demanda pelo atendimento desses idosos é grande, chamando atenção para a necessidade de testes rápidos, com boa acurácia e de simples aplicação para identificar o comprometimento cognitivo.

Objetivo Desenvolver e validar a versão brasileira do Mini-Addenbrooke's Cognitive Examination (M-ACE BR) como um teste rápido para rastreio de comprometimento cognitivo em idosos.

Métodos A M-ACE BR foi desenvolvida usando análise da escala de Mokken em 352 participantes (cognitivamente saudáveis [CS] = 232, comprometimento cognitivo sem demência [CCSD] = 82; e demência = 38) e validado em uma amostra independente de 117 participantes (CS = 25; CCSD = 88; e demência = 4).

Resultados A análise de escala de Mokken derivou 9 itens (orientação espacial, memória anterógrada, memória retrógrada, evocação tardia, reconhecimento [nome e endereço], fluência verbal de letras, repetição de 4 palavras, nomeação de 10 itens e compreensão) com pontuação máxima de 51 pontos e tempo médio de duração de 7 minutos. O escore de corte ≤ 43/51 para CCSD teve sensibilidade de 59,09% e especificidade de 80%. Para um teste de rastreio, em que a sensibilidade é priorizada para investigação posterior, sugerimos utilizar um ponto de corte ≤ 47 (sensibilidade 85,23% e especificidade 24%), mantendo um bom valor preditivo positivo (79,8%).

Conclusão A M-ACE BR é um instrumento breve e adequado para detectar comprometimento cognitivo em idosos brasileiros. No entanto, o rastreio para a identificação de CCSD e para diferentes níveis de escolaridade deve ser melhor explorado.

Keywords

Dementia - Diagnosis - Mental Status and Dementia Tests - Cognitive Dysfunction - Neuropsychological Tests

Palavras-chave

Demência - Diagnóstico - Testes de Estado Mental e Demência - Comprometimento Cognitivo - Teste Cognitivo

Author's Contributions

MOO, SMDB: conceptualization and design of the work; MOO, MTCG, KGC, RN, SMDB: data acquisition; MOO, MTCG, KGC, SMDB: analysis and interpretation; MOO, MTCG, KGC, SMDB: writing; MOO, MTCG, KGC, RN, SMDB: review of the manuscript. All authors approved the final version of the manuscript and agree to be responsible for all aspects of the work.

Publication History

Received: 12 June 2023

Accepted: 04 April 2024

Article published online:
08 August 2024

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