Abstract
The Clock Drawing Test (CDT) is a simple neuropsychometric instrument that can be easily applied to assess several cognitive functions. Over the past 20 years, the CDT has aroused considerable interest in its role for the early screening of cognitive impairment, especially in dementia. Although the CDT is considered an accurate test for dementia screening, recent studies including comparisons with structured batteries such as the CAMCOG have shown mixed results.
Objectives:
To investigate the importance of the CDT compared to other commonly used tests, in the diagnosis of dementia in the elderly; (2) to evaluate the reliability and correlation between available CDT scoring scales from recent studies.
Methods:
A systematic search in the literature was conducted in September 2008 for studies comparing CDT scoring systems and comparing the CDT with neuropsychiatric batteries.
Results:
Twelve studies were selected for analyses. Seven of these studies compared CDT scoring scales while five compared the CDT against the CAMCOG and the MMSE. Eight studies found good correlation and reliability between the scales and the other tests.
Conclusion:
Despite the mixed results in these studies, the CDT appears to be a good screening test for dementia.
Key words:
clock drawing test; dementia; elderly.
Resumo
O Teste do Desenho do Relógio (TDR) é um instrumento neuropsiquiátrico simples que pode ser aplicado facilmente para avaliar diversas funções cognitivas. Nos últimos 20 anos, o TDR tem despertado interesse considerável sobre seu papel no rastreio precoce de declínio cognitivo, especialmente na demência. Apesar do TDR ser considerado um bom teste para o rastreio da demência, estudos recentes com comparações com baterias neuropsiquiátricas como o CAMCOG mostram resultados variados.
Objetivos:
Investigar a importância do TDR quando comparado com outros testes comumente utilizados no diagnóstico de demência; avaliar a confiabilidade e a correlação entre escalas de pontuação do TDR em estudos recentes.
Métodos:
Uma busca sistemática na literatura foi concluída em setembro de 2008, incluindo estudos que compararam sistemas de pontuação de TDR e que compararam o TDR com baterias neuropsicométricas.
Resultados:
Doze estudos foram selecionados para análise. Sete compararam escalas de pontuação de TDR e cinco compararam o TDR com o CAMCOG e o MEEM. Oito estudos encontraram boa correlação e confiabilidade entre as escalas e outros testes.
Conclusão:
Apesar dos resultados variados nesses estudos, o TDR parece ser um bom teste de rastreio cognitivo para demência.
Palavras-chave:
teste do desenho do relógio; demência; idosos.
Texto completo disponível apenas em PDF.
Full text available only in PDF format.
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Publication Dates
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Publication in this collection
Apr-Jun 2009
History
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Received
16 Feb 2009 -
Accepted
18 May 2009