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Doctoral Thesis
DOI
https://doi.org/10.11606/T.5.2022.tde-22092022-171638
Document
Author
Full name
Viviane Amaral Carvalho
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2022
Supervisor
Committee
Caramelli, Paulo (President)
Brucki, Sônia Maria Dozzi
Diniz, Leandro Fernandes Malloy
Tumas, Vitor
Title in Portuguese
O Exame Cognitivo de Addenbrooke versão revisada (ACE-R) no diagnóstico diferencial das demências degenerativas
Keywords in Portuguese
Cognição
Demência
Demência frontotemporal
Doença de Alzheimer
Envelhecimento
Testes Neuropsicológicos
Abstract in Portuguese
O aumento da expectativa de vida implica no surgimento de condições neurológicas crônico-degenerativas, como o comprometimento cognitivo e a demência. Entre os transtornos mais frequentes, estão o comprometimento cognitivo leve (CCL), a doença de Alzheimer (DA) e a demência frontotemporal variante comportamental (DFTvc), o que justifica o delineamento de seus perfis cognitivos em instrumentos de investigação breve adequados à realidade brasileira. O Exame Cognitivo de Addenbrooke versão revisada (ACE-R) é uma bateria de testes que pode contribuir para a diferenciação e pesquisa sobre tais transtornos. O objetivo desta tese é investigar o valor diagnóstico do ACE-R em CCL, DA e DFTvc. Para isso, o ACE-R foi administrado a 102 pacientes com demência leve devido à DA provável, 37 com DFTvc leve, 87 com CCL amnéstico e a 161 controles. Os desempenhos de pacientes e controles foram analisados por curvas ROC para aferir a capacidade de discriminação do instrumento no diagnóstico de DA e DFTvc. Por método de regressão logística e análise de escala Mokken, novos modelos foram propostos para refinar a acurácia diagnóstica do ACE-R. Observou-se que as médias da pontuação total no ACE-R foram 70,2 para pacientes com DA, 72,2 para DFTvc, 79,8 para CCL e 85,1 para controles. A Razão VLOM mostrou área sob a curva (ASC) de 0,816, com 87% e 71% de sensibilidade (S) e especificidade (E), 73% de valor preditivo positivo (VPP) e 86% de valor preditivo negativo (VPN) para diferenciação entre DFTvc e DA. O logaritmo proposto para discriminar DFTvc e DA mostrou-se superior, com ASC de 0,865. A escala Mokken da DA x DFTvc revelou ASC = 0,922, com 88% S e E, 71% VPP e 96 VPN. Com a escala Mokken de CCL x controles, o ACE-R evidenciou ASC de 0,859, com 78% S, 79% E, 66 VPP e 86 VPN. Esses dados permitem concluir, portanto, que o ACE-R brasileiro alcançou alto poder discriminatório entre DA e DFTvc e CCL e controles nesta amostra. Métodos mais sofisticados de análises dos componentes da bateria podem ser implementados para refinar o valor diagnóstico do ACE-R
Title in English
The Brazilian version of Addenbrooke`s Cognitive Examination Revised (ACE-R) in the differential diagnosis of neurodegenerative dementias
Keywords in English
Aging
Alzheimer's Disease
Cognition
Dementia
Frontotemporal Dementia
Neuropsychological Tests
Abstract in English
The increase in life expectancy implies the emergence of chronic-degenerative conditions, such as cognitive impairment and dementia. Among the most frequent disorders, Mild Cognitive Impairment (MCI), Alzheimer's disease (AD) and behavioral variant of Frontotemporal dementia (bvFTD) can be cited, which justifies the design of their cognitive profiles in brief investigation instruments within our midst. The Addenbrooke Cognitive Examination-Revised (ACE-R) is a cognitive battery that can add to this context. The aim was to investigate the diagnostic value of ACE-R in MCI, AD and bvFTD. The ACE-R was administered to 102 patients with mild dementia due to probable AD, 37 with mild bvFTD, 87 with amnestic MCI and 161 controls. The performances of patients and controls were analyzed by ROC curves to assess the instrument's ability to discriminate in the diagnosis of AD and bvFTD. By means of logistic regression and Mokken scale analysis, new models were proposed to refine the diagnostic accuracy of the ACE-R. The mean total score on the ACE-R was 70.2 for AD patients, 72.2 for bvFTD, 79.8 for MCI and 85.1 for controls. The VLOM ratio showed an area under the curve (AUC) of 0.816, with 87% and 71% sensitivity (S) and specificity (E), 73% positive predictive value (PPV) and 86% negative predictive value (NPV) to differentiate bvFTD from AD. The logarithm proposed to discriminate bvFTD and AD proved to be superior, with an AUC of 0.865. The Mokken scale of AD versus bvFTD revealed ASC = 0.922, with 88% S and E, 71% PPV and 96 NPV. Using the Mokken scale of CCL versus controls, the ACE-R showed an ASC of 0.859, with 78% S, 79% E, 66% PPV and 86% NPV. We may conclude that the Brazilian ACE-R achieved high discriminatory power to differentiate AD and bvFTD, as well MCI and controls in this sample. More sophisticated analysis methods using battery components can be implemented to refine the diagnostic value of the ACE-R
 
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Publishing Date
2022-09-23
 
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