Miniexame do Estado Mental: evidências de validade baseadas na estrutura interna

Abstract

RESUMOEm razão da escassez de pesquisas que investigaram empiricamente a dimensionalidade do Miniexame do Estado Mental (MEEM), este estudo teve como objetivo obter evidências de validade com base na estrutura interna para essa medida por meio de análise de componentes principais (ACP) e de análise fatorial confirmatória (AFC ABSTRACT -Minimental State Examination: Validity evidence based on internal structureStudies that empirically investigate the dimensionality of the Minimental State Examination (MMSE) are few. For this reason, this study aimed to obtain validity evidence based on internal structure for this measure by principal component analysis (PCA) and confirmatory factor analysis (CFA). The sample of 2,734 community-dwelling elderly people was randomly divided into two groups: PCA (n=1,361) and CFA (n=1,373). In the PCA, a five components solution was the best -School Skills, Guidance, Short Term Memory, MemoryEvocation and Memory -Recognition. Four internal structure models were tested with CFA, including the PCA formed. Three models with a multidimensional structure of five factors and a factor of second order showed satisfactory fit indices, which did not happen with the one-dimensional model. Therefore, the MMSE seems to be a multidimensional measure, but further studies are recommended. Keywords: aging; neuropsychological assessment; factor analysis. RESUMEN -Mini Examen del Estado Mental: evidencia de validez basada en la estructura internaDebido a la escasez de los trabajos que investigan empíricamente la dimensionalidad del Mini Examen del Estado Mental (MEEM), este estudio tiene como objetivo obtener evidencia de validez basada en la estructura interna de esta medida por análisis de componentes principales (PCA) y el análisis factorial confirmatorio (AFC). La muestra de 2.734 adultos mayores residentes en la comunidad se dividió aleatoriamente en dos grupos: ACP (n=1.361) y AFC (n=1.373). En el ACP, una solución con cinco componentes -Competencias en la Escuela, Dirección, Memoria a Corto plazo, Memoria -Evocación y Memoria de Reconocimiento -fue la más apropiada. Cuatro modelos de estructuras internas fueron probados con AFC, incluyendo el formado en la ACP formado. Tres modelos con estructura multidimensional de cinco factores y un factor de segundo orden mostraron índices de ajuste satisfactorios, lo que no ocurrió con el modelo unidimensional. Así, el MEEM parece ser una prueba multidimensional, sin embargo se recomiendan más estudios. Palabras clave: envejecimiento; evaluación neuropsicológica; análisis factorial.

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