Efectividad del Mini-Mental en la detección del deterioro cognitivo en Atención Primaria / Effectiveness of the Mini-Mental State for detection of cognitive impairment in Primary Care

Objetivo: Evaluar la utilidad diagnóstica (UD) del Mini-Mental (MMS) en la detección del deterioro cognitivo (DC) en Atención Primaria (AP) y determinar las mejores condiciones de aplicación para este fin. Diseño: Análisis conjunto de 2 estudios de evaluación de pruebas diagnósticas prospectivos con selección consecutiva y sistemática, verificación completa y doble cegamiento, realizados en Madrid y Granada. Emplazamiento: El MMS fue aplicado en AP y el diagnóstico de referencia en Atención Especializada. Participantes: Se seleccionaron de forma consecutiva y sistemática sujetos con quejas o sospecha de DC atendidos en AP. Mediciones principales: La UD del MMS se evaluó mediante el área bajo la curva ROC (AUC) y se consideró mejor punto de corte el que ofrecía la mayor tasa de aciertos diagnósticos (TAD) y el mayor índice kappa. Se analizó de forma independiente la UD para las puntuaciones directas (MMSd) y ajustadas por edad y nivel educativo (MMSa). Resultados: En la muestra total de 360 sujetos (214 DC), la UD de MMSd fue significativamente superior a la de MMSa (0,84 ± 0,02 vs 0,82 ± 0,02, p ≤ 0,001). El rendimiento diagnóstico conseguido por el MMSd con el mejor punto de corte (22/23) fue discreto (TAD 0,77, kappa 0,52 ± 0,05), pero no fue mejorado por ningún punto de corte del MMSa. Conclusión: El Mini-Mental tiene una UD discreta para la detección de DC en AP que no mejora con la corrección de las puntuaciones por edad y nivel educativo; el mejor punto de corte es 22/23, inferior al habitualmente recomendado (AU)

Objective: To evaluate the diagnostic accuracy (DA) of the Mini-Mental State (MMS) for the detection of cognitive impairment (CI) in Primary Care (PC) and to determine the best conditions of use for that purpose. Design: Pooled analysis of two prospective, double blind, studies on the evaluation of diagnostic tools with complete verification that were conducted in Madrid and Granada (Spain).Setting: The MMS was administered in PC and the final cognitive diagnosis (gold standard) was made in Specialized Care. Participants: Subjects with cognitive complaints or suspected of having CI were consecutively recruited in the PC clinic. Principal measures: The DA of the MMS was evaluated using the area under the receiver operating characteristic (ROC) curve (AUC). The best cut-off point was selected according to the ratio of cases correctly classified (RCC) and to the kappa index. Direct (MMSd) and age- and education-adjusted (MMSa) total scores were analyzed separately. Results: In the total sample of 360 subjects (214 CI), the DA of the MMSd was significantly superior to that of the MMSa (0.84±0.02 vs 0.82±0.02, p≤.001). The yield obtained by the best cut-off point of the MMSd (22/23) was modest (RCC 0.77, kappa 0.52±0.05) and was not improved by any MMSa cut-off point. Conclusion: The DA of the MMS for detection of CI in PC was modest and did not improve with adjustment of the score by age and education. The best cut-off point was 22/23, inferior to the usually recommended cut-off (AU)

[Effectiveness of the Mini-Mental State for detection of cognitive impairment in primary care]. / Efectividad del Mini-Mental en la detección del deterioro cognitivo en Atención Primaria.

OBJECTIVE: To evaluate the diagnostic accuracy (DA) of the Mini-Mental State (MMS) for the detection of cognitive impairment (CI) in Primary Care (PC) and to determine the best conditions of use for that purpose. DESIGN: Pooled analysis of two prospective, double blind, studies on the evaluation of diagnostic tools with complete verification that were conducted in Madrid and Granada (Spain). SETTING: The MMS was administered in PC and the final cognitive diagnosis (gold standard) was made in Specialized Care. PARTICIPANTS: Subjects with cognitive complaints or suspected of having CI were consecutively recruited in the PC clinic. PRINCIPAL MEASURES: The DA of the MMS was evaluated using the area under the receiver operating characteristic (ROC) curve (AUC). The best cut-off point was selected according to the ratio of cases correctly classified (RCC) and to the kappa index. Direct (MMSd) and age- and education-adjusted (MMSa) total scores were analyzed separately. RESULTS: In the total sample of 360 subjects (214 CI), the DA of the MMSd was significantly superior to that of the MMSa (0.84±0.02 vs 0.82±0.02, p≤.001). The yield obtained by the best cut-off point of the MMSd (22/23) was modest (RCC 0.77, kappa 0.52±0.05) and was not improved by any MMSa cut-off point. CONCLUSION: The DA of the MMS for detection of CI in PC was modest and did not improve with adjustment of the score by age and education. The best cut-off point was 22/23, inferior to the usually recommended cut-off.