Some aspects of the validity of the Montreal Cognitive Assessment (MoCA)for evaluating cognitive impairment in Brazilian patients with Parkinson's disease

Detalhes bibliográficos
Autor(a) principal: Tumas,Vitor
Data de Publicação: 2016
Outros Autores: Borges,Vanderci, Ballalai-Ferraz,Henrique, Zabetian,Cyrus P., Mata,Ignácio F., Brito,Manuelina M.C., Foss,Maria Paula, Novaretti,Nathalia, Santos-Lobato,Bruno Lopes
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Dementia & Neuropsychologia
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-57642016000400333
Resumo: ABSTRACT Background: The Montreal Cognitive Assessment (MoCA) is a short global cognitive scale, and some studies suggest it is useful for evaluating cognition in patients with Parkinson's disease (PD). However, its accuracy has been questioned in studies involving patients with low education. Objective: We sought to assess whether some of the MoCA subtests contribute to the low accuracy of the test. Methods: We performed a cross-sectional retrospective analysis of clinical data in a cohort of 71 patients with PD, most with less than 8 years of education. Patients were examined using the MDS-UPDRS, Hoehn and Yahr and the MoCA. The data were analyzed using mainly descriptive statistics. Results: We analyzed the data of 66 patients that were not demented according to the clinical evaluation and classified them using the proposed cut-off MoCA scores for diagnosis of MCI and dementia. Thirteen patients (19.7%) were classified as having normal cognition, 24 (36.3%) MCI and 29 (43.9%) dementia. Patients with dementia had longer disease duration (p=0.016) and lower education (p=0.0001). Total MoCA scores had a an almost normal distribution with a wide range of scores and only one maximum score. Performance on the MoCA was highly correlated with education (correlation coefficient=0.66, p=0.0001). At least five of the 10 MoCA subtests showed significant floor effects. Conclusion: We believe that some of the MoCA subtests may be too difficult to be completed by PD patients with low educational level, thus contributing to the test's poor diagnostic accuracy.
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spelling Some aspects of the validity of the Montreal Cognitive Assessment (MoCA)for evaluating cognitive impairment in Brazilian patients with Parkinson's diseaseMoCAvalidityParkinson's diseasemild cognitive impairmentdementiacognitive assessmentABSTRACT Background: The Montreal Cognitive Assessment (MoCA) is a short global cognitive scale, and some studies suggest it is useful for evaluating cognition in patients with Parkinson's disease (PD). However, its accuracy has been questioned in studies involving patients with low education. Objective: We sought to assess whether some of the MoCA subtests contribute to the low accuracy of the test. Methods: We performed a cross-sectional retrospective analysis of clinical data in a cohort of 71 patients with PD, most with less than 8 years of education. Patients were examined using the MDS-UPDRS, Hoehn and Yahr and the MoCA. The data were analyzed using mainly descriptive statistics. Results: We analyzed the data of 66 patients that were not demented according to the clinical evaluation and classified them using the proposed cut-off MoCA scores for diagnosis of MCI and dementia. Thirteen patients (19.7%) were classified as having normal cognition, 24 (36.3%) MCI and 29 (43.9%) dementia. Patients with dementia had longer disease duration (p=0.016) and lower education (p=0.0001). Total MoCA scores had a an almost normal distribution with a wide range of scores and only one maximum score. Performance on the MoCA was highly correlated with education (correlation coefficient=0.66, p=0.0001). At least five of the 10 MoCA subtests showed significant floor effects. Conclusion: We believe that some of the MoCA subtests may be too difficult to be completed by PD patients with low educational level, thus contributing to the test's poor diagnostic accuracy.Academia Brasileira de Neurologia, Departamento de Neurologia Cognitiva e Envelhecimento2016-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-57642016000400333Dementia & Neuropsychologia v.10 n.4 2016reponame:Dementia & Neuropsychologiainstname:Associação de Neurologia Cognitiva e do Comportamento (ANCC)instacron:ANCC10.1590/s1980-5764-2016dn1004013info:eu-repo/semantics/openAccessTumas,VitorBorges,VanderciBallalai-Ferraz,HenriqueZabetian,Cyrus P.Mata,Ignácio F.Brito,Manuelina M.C.Foss,Maria PaulaNovaretti,NathaliaSantos-Lobato,Bruno Lopeseng2016-12-19T00:00:00Zoai:scielo:S1980-57642016000400333Revistahttp://www.demneuropsy.com.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||demneuropsy@uol.com.br1980-57641980-5764opendoar:2016-12-19T00:00Dementia & Neuropsychologia - Associação de Neurologia Cognitiva e do Comportamento (ANCC)false
dc.title.none.fl_str_mv Some aspects of the validity of the Montreal Cognitive Assessment (MoCA)for evaluating cognitive impairment in Brazilian patients with Parkinson's disease
title Some aspects of the validity of the Montreal Cognitive Assessment (MoCA)for evaluating cognitive impairment in Brazilian patients with Parkinson's disease
spellingShingle Some aspects of the validity of the Montreal Cognitive Assessment (MoCA)for evaluating cognitive impairment in Brazilian patients with Parkinson's disease
Tumas,Vitor
MoCA
validity
Parkinson's disease
mild cognitive impairment
dementia
cognitive assessment
title_short Some aspects of the validity of the Montreal Cognitive Assessment (MoCA)for evaluating cognitive impairment in Brazilian patients with Parkinson's disease
title_full Some aspects of the validity of the Montreal Cognitive Assessment (MoCA)for evaluating cognitive impairment in Brazilian patients with Parkinson's disease
title_fullStr Some aspects of the validity of the Montreal Cognitive Assessment (MoCA)for evaluating cognitive impairment in Brazilian patients with Parkinson's disease
title_full_unstemmed Some aspects of the validity of the Montreal Cognitive Assessment (MoCA)for evaluating cognitive impairment in Brazilian patients with Parkinson's disease
title_sort Some aspects of the validity of the Montreal Cognitive Assessment (MoCA)for evaluating cognitive impairment in Brazilian patients with Parkinson's disease
author Tumas,Vitor
author_facet Tumas,Vitor
Borges,Vanderci
Ballalai-Ferraz,Henrique
Zabetian,Cyrus P.
Mata,Ignácio F.
Brito,Manuelina M.C.
Foss,Maria Paula
Novaretti,Nathalia
Santos-Lobato,Bruno Lopes
author_role author
author2 Borges,Vanderci
Ballalai-Ferraz,Henrique
Zabetian,Cyrus P.
Mata,Ignácio F.
Brito,Manuelina M.C.
Foss,Maria Paula
Novaretti,Nathalia
Santos-Lobato,Bruno Lopes
author2_role author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Tumas,Vitor
Borges,Vanderci
Ballalai-Ferraz,Henrique
Zabetian,Cyrus P.
Mata,Ignácio F.
Brito,Manuelina M.C.
Foss,Maria Paula
Novaretti,Nathalia
Santos-Lobato,Bruno Lopes
dc.subject.por.fl_str_mv MoCA
validity
Parkinson's disease
mild cognitive impairment
dementia
cognitive assessment
topic MoCA
validity
Parkinson's disease
mild cognitive impairment
dementia
cognitive assessment
description ABSTRACT Background: The Montreal Cognitive Assessment (MoCA) is a short global cognitive scale, and some studies suggest it is useful for evaluating cognition in patients with Parkinson's disease (PD). However, its accuracy has been questioned in studies involving patients with low education. Objective: We sought to assess whether some of the MoCA subtests contribute to the low accuracy of the test. Methods: We performed a cross-sectional retrospective analysis of clinical data in a cohort of 71 patients with PD, most with less than 8 years of education. Patients were examined using the MDS-UPDRS, Hoehn and Yahr and the MoCA. The data were analyzed using mainly descriptive statistics. Results: We analyzed the data of 66 patients that were not demented according to the clinical evaluation and classified them using the proposed cut-off MoCA scores for diagnosis of MCI and dementia. Thirteen patients (19.7%) were classified as having normal cognition, 24 (36.3%) MCI and 29 (43.9%) dementia. Patients with dementia had longer disease duration (p=0.016) and lower education (p=0.0001). Total MoCA scores had a an almost normal distribution with a wide range of scores and only one maximum score. Performance on the MoCA was highly correlated with education (correlation coefficient=0.66, p=0.0001). At least five of the 10 MoCA subtests showed significant floor effects. Conclusion: We believe that some of the MoCA subtests may be too difficult to be completed by PD patients with low educational level, thus contributing to the test's poor diagnostic accuracy.
publishDate 2016
dc.date.none.fl_str_mv 2016-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-57642016000400333
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-57642016000400333
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/s1980-5764-2016dn1004013
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Academia Brasileira de Neurologia, Departamento de Neurologia Cognitiva e Envelhecimento
publisher.none.fl_str_mv Academia Brasileira de Neurologia, Departamento de Neurologia Cognitiva e Envelhecimento
dc.source.none.fl_str_mv Dementia & Neuropsychologia v.10 n.4 2016
reponame:Dementia & Neuropsychologia
instname:Associação de Neurologia Cognitiva e do Comportamento (ANCC)
instacron:ANCC
instname_str Associação de Neurologia Cognitiva e do Comportamento (ANCC)
instacron_str ANCC
institution ANCC
reponame_str Dementia & Neuropsychologia
collection Dementia & Neuropsychologia
repository.name.fl_str_mv Dementia & Neuropsychologia - Associação de Neurologia Cognitiva e do Comportamento (ANCC)
repository.mail.fl_str_mv ||demneuropsy@uol.com.br
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