Executive cognitive tests for the evaluation of patients with Parkinson's disease

Parkinson's disease (PD) is characterized by changes in movement, which are later followed by cognitive, behavioral and psychological changes. The objective of the present study was to correlate different tests used to examine executive functions in PD patients followed at a specialized outpatient clinic. Methods: Thirty-five patients with idiopathic PD aged 63.0 years on average and with mean schooling of 5.5±4.2 years, were examined using the following tests: Mattis Dementia Rating Scale (MDRS), Scales for Outcomes of Parkinson's Disease-Cognition (SCOPA-COG), Wisconsin Card Sorting Test (WCST), Frontal Assessment Battery (FAB), Digit Span - Inverse Order (IO) (a subtest of the WAIS III) and Verbal Fluency Test (category animals). Results: Significant correlations were detected between FAB and MDRS Conceptualization (0.814), MDRS Initiation/Perseveration (I/P) and SCOPA-COG Executive Function (0.643), FAB and MDRS I/P (0.601), FAB and Verbal Fluency (0.602), MDRS I/P and MDRS Conceptualization (0.558), Verbal Fluency and MDRS I/P (0.529), MDRS Attention and SCOPA-COG Executive Function (0.495), MDRS Conceptualization and SCOPA-COG Executive Function (0.520), FAB and Digit Span (OI) (0.503), Verbal Fluency and MDRS Conceptualization (0.501), and WCST perseverative errors and FAB (-0.379), WCST perseverative errors and MDRS Conceptualization (0.445), WCST perseverative errors and MDRS I/P (-0.407) and WCST categories completed and MDRS Conceptualization (0.382). Discussion: The results demonstrated strong correlations between most of the tests applied, but no associations were detected between the WCST and the other tests, a fact that may be explained by the heterogeneity of scores obtained in the tests by the patients evaluated. A difficulty of the present study was the lack of a control groups for the establishment of adequate standards for this population. Resumo A doença de Parkinson (DP) caracteriza-se por alterações do movimento, cognitivas, comportamentais e psicológicas. O objetivo do presente estudo foi correlacionar diferentes testes que examinam funções executivas em pacientes com DP acompanhados em um ambulatório especializado. Métodos: Foram avaliados 35 pacientes com DP idiopática com idade média de 63,0 anos e escolaridade média de 5,5±4,2 utilizando os seguintes testes: Escala de Avaliação de demência de Mattis (EADM), Escala de Desfechos da Doença de Parkinson (SCOPA-COG), Teste Wisconsin de Classificação de Cartas (WCST), Bateria de Avaliação Frontal (BAF), Amplitude de Dígitos-Ordem Inversa (OI) (subteste do WAIS III) e Teste de Fluência Verbal (categoria animais). Resultados: Foram encontradas correlações significativas entre BAF e EADM Conceituação (0,814), EADM Iniciativa/Perseveração (I/P) e SCOPA-COG Funções Executivas (0,643), BAF e EADM I/P (0,601), BAF e Fluência Verbal (0,602) e EADM I/P e EADM Conceituação (0,558), Fluência Verbal e EADM I/P (0,529), EADM Atenção e SCOPA-COG Funções Executivas (0,49), EADM Conceituação e SCOPA-COG Funções Executivas (0,495), BAF e Amplitude de dígitos (OI) (0,503), Fluência Verbal e EADM Conceituação (0,501), WCST Erros Perseverativos e BAF (-0,379), WCST erros perseverativos e MDRS Conceptualization (-0,445), WCST erros perseverativos e EADM I/P (-0,407) e WCST categorias completas e EADM Conceituação (0,382). Discussão: Os resultados evidenciaram fortes correlações entre a maioria dos testes aplicados. Uma dificuldade do estudo presente diz respeito à falta de grupo controle para estabelecer padrões adequados a essa população.