Validez de la escala MNA como factor de riesgo nutricional en pacientes geriátricos institucionalizados con deterioro cognitivo moderado y severo / Validation of score in MNA scale like nutritional risk factor in institutionalized geriatric patients with moderate and severe cognitive impairment

Introducción: La valoración geriátrica integral incluye el examen del apartado nutricional debido a la alta prevalencia de desnutrición en este tipo de pacientes; especialmente en los pacientes con deterioro cognitivo asociado. Las escalas de cribado del estado nutricional presentan preguntas de autopercepción subjetiva de difícil respuesta en pacientes mayores con demencia. Objetivo: Estudiar la especificidad, el valor predictivo positivo y la sensibilidad de la escala MNA para la detección de malnutrición en pacientes diagnosticados de enfermedad de Alzheimer con deterioro cognitivo avanzado. Material y métodos: Se diseñó un estudio descriptivo poblacional con una muestra de 52 pacientes mayores de 70 años, institucionalizados, con enfermedad de Alzheimer grado moderado y severo. Se estudió la sensibilidad, especificidad y valor predictivo positivo de la escala MNA respecto a los parámetros de malnutrición del American Institute of Nutrition (AIN). Resultados: Los valores de sensibilidad, especificidad y valor predictivo positivo son 60%, 94,7% y 93,8% respectivamente. Existe una correlación significativa (p < 0,001) ente la puntuación obtenida en la escala MNA y la escala de riesgo de caídas Tinneti (r = 0,577), de función Barthel (r = 0,742), de valoración cognitiva MEC (r = 0,651) y los niveles de creatinina (r = 0,402). Más del 50% de la muestra presentó al menos un parámetro de malnutrición AIN alterado. Conclusiones: La escala MNA presenta una menor sensibilidad y especificidad en estos pacientes. El diseño de una escala de valoración nutricional sin valoraciones subjetivas y sólo con parámetros objetivos podría mejorar la eficacia de la misma en ancianos institucionalizados con deterioro cognitivo moderado y severo (AU)

Introduction: comprehensive geriatric assessment includes examination of the nutritional status given the high prevalence of hyponutrition in this kind of patients, particularly in patients with associated cognitive impairment. Scales for screening the nutritional status include questions on self-perception difficult to answer by demented elder patients. Objective: To study the specificity, the positive predictive value, and the sensitivity of the MNA scale to detect malnutrition in patients diagnosed with Alzheimer's disease with advanced cognitive impairment. Material and methods: a population-based descriptive study with a sample of 52 patients older than 70 years, institutionalized, and with moderate-severe Alzheimer's disease was designed. The sensitivity, specificity, and positive predictive value of MNA scale were studied regarding the parameters on malnutrition of the American Institute of Nutrition (AIN). Results: the sensitivity, specificity, and positive predictive values were 60%, 94.7%, and 93.8%, respectively. There was a significant correlation (p < 0.001) between the score obtained with the MNA Scale and the Tinneti's Risk of Fall Scale (r = 0.577), the Barthel's function (r = 0.742), the MCT cognitive assessment (r = 0.651), and creatinine levels (r = 0.402). More than 50% of the sample presented at least one malnutrition parameter altered. Conclusions: the MNA Scale presents lower sensitivity and specificity in these patients. Designing a nutritional assessment scale without subjective evaluations and only with objective parameters might improve its efficiency in institutionalized elderly patients with moderate-severe cognitive impairment (AU)

[Validation of MNA scale score as a nutritional risk factor in institutionalized geriatric patients with moderate and severe cognitive impairment]. / Validez de la escala MNA como factor de riesgo nutricional en pacientes geriátricos institucionalizados con deterioro cognitivo moderado y severo.

INTRODUCTION: comprehensive geriatric assessment includes examination of the nutritional status given the high prevalence of hyponutrition in this kind of patients, particularly in patients with associated cognitive impairment. Scales for screening the nutritional status include questions on self-perception difficult to answer by demented elder patients. OBJECTIVE: To study the specificity, the positive predictive value, and the sensitivity of the MNA scale to detect malnutrition in patients diagnosed with Alzheimer's disease with advanced cognitive impairment. MATERIAL AND METHODS: a population-based descriptive study with a sample of 52 patients older than 70 years, institutionalized, and with moderate-severe Alzheimer's disease was designed. The sensitivity, specificity, and positive predictive value of MNA scale were studied regarding the parameters on malnutrition of the American Institute of Nutrition (AIN). RESULTS: the sensitivity, specificity, and positive predictive values were 60%, 94.7%, and 93.8%, respectively. There was a significant correlation (p < 0.001) between the score obtained with the MNA Scale and the Tinneti's Risk of Fall Scale (r = 0.577), the Barthel's function (r = 0.742), the MCT cognitive assessment (r = 0.651), and creatinine levels (r = 0.402). More than 50% of the sample presented at least one malnutrition parameter altered. CONCLUSIONS: the MNA Scale presents lower sensitivity and specificity in these patients. Designing a nutritional assessment scale without subjective evaluations and only with objective parameters might improve its efficiency in institutionalized elderly patients with moderate-severe cognitive impairment.