[Descriptive epidemiology and frequency variations of astrocytic tumors in the National Institute of Neurology and Neurosurgery of Mexico]. / Epidemiología descriptiva y cambios en la frecuencia de tumores astrocíticos en el Instituto Nacional de Neurología y Neurocirugía de México.

OBJECTIVE: To determine distribution, localization and frequency variations of astrocytic tumors (AT) in a Mexican Institute of neurology. MATERIALS AND METHODS: Institutional registries of AT from five decades were analyzed. AT/ Surgical discharges (SD) and AT/Central Nervous System Tumors (CNST) from 1995 to 2014 were compared. RESULTS: Two thousand two hundred and eighty-seven AT (1 356 men and 931 women) were analyzed. The most common glioma was glioblastoma multiforme (GBM), found in young adults with a higher frequency to that reported in other studies. Relation of AT/SD, as well as, relation of AT/CNST was similar between 1995 and 2014. CONCLUSIONS: In general, the frequency of AT worldwide, being higher in the subgroup of young adults with GBM. There was not significant variation in the frequency of AT during the time studied.

OBJETIVO: Determinar distribución, localización y cambios de la frecuencia de tumores astrocíticos (TA) en un instituto mexicano de neurología. MATERIAL Y MÉTODOS: Se revisaron los registros institucionales de TA de cinco décadas. Se compararon las relaciones TA/egresos quirúrgicos (EQ) y TA/total de tumores del sistema nervioso central (TSNC) de 1995 a 2014. RESULTADOS: Se analizaron 2 287 TA (1 356 en hombres y 931 en mujeres). El glioma más común fue el glioblastoma multiforme (GBM), que estuvo presente en adultos jóvenes con una frecuencia mayor a la reportada en otros estudios. La relación TA/EQ y TA/TNSC fue similar entre 1995 y 2014. CONCLUSIONES: En general, la frecuencia de TA atendidos en el Instituto es similar a la reportada internacionalmente. No obstante, los casos de TA en el subgrupo de adultos jóvenes con GBM son más frecuentes (40%) que las incidencias reportadas en otros estudios (menores al 5%). No se encontró variación significativa en la frecuencia de TA durante las últimas dos décadas.

[Validation of a cutoff point for the short version of the Depression Scale of the Center for Epidemiologic Studies in older Mexican adults]. / Validación de un punto de corte para la versión breve de la Escala de Depresión del Centro de Estudios Epidemiológicos en adultos mayores mexicanos.

OBJECTIVE: To identify a valid cutoff point associated with Center for Epidemiologic Studies, Depression Scale (CES-D) of seven items, which allows the classification of older adults according to presence/absence of clinically significant depressive symptoms. MATERIALS AND METHODS: Screening study with 229 older adults residing in two states of Mexico (Morelos and Tlaxcala), which were part of the sample from the National Survey of Health and Nutrition, 2012. We estimated the sensitivity and specificity associated with the selected cutoff points using the diagnostic criteria of ICD-10 (International Classification of Diseases, 10th revision) and DSM-IV (Diagnostic and Statistical Manual of Mental Disorders, fourth edition). RESULTS: The cutoff point estimated was CES-D=5. According to the ICD-10 sensitivity and specificity were 83.3 and 90.2%, and ROC was 87%. Using DSM-IV, the values were 85, 83.2, and 84%, respectively. CONCLUSIONS: The short version of the CES-D can be used as a screening test to identify probable cases of older adults with clinically significant depressive symptoms.

[Neuropsychiatric symptoms in older adults with dementia and their relationship to disease severity]. / Síntomas neuropsiquiátricos en adultos mayores con demencia y su relación con la severidad de la enfermedad.

UNLABELLED: Neuropsychiatric symptoms are the psychopathological dimension of dementia and they integrate a set of symptoms among those are: personality, behavioral and basic functions changes. OBJECTIVE: To analyze the prevalence of neuropsychiatric symptoms in elder people diagnosed with dementia, the association of symptoms with each other, their relationship with the severity of the disease and the stress generated by them in caregivers. MATERIAL AND METHODS: Secondary data analysis of 180 cases diagnosed with dementia from a population-based cross-sectional study of 2,003 older adults living in rural and urban areas of low to medium income in Mexico. RESULTS: Twelve symptoms were assessed using the Neuropsychiatric Inventory, with depression (47.8%), sleep disorders (37.2%) and irritability (34.4%) being the most prevalent ones. Statistically significant associations were found between severity of dementia and frequency of delusions, hallucinations, agitation, depression, euphoria, apathy, disinhibition, irritability and aberrant motor behavior. Anxiety, depression and sleep disorders were associated with mild/moderate caregivers stress levels. Three factors were identified by clustering technique Principal Components Analysis: the first conforming by delusions, disinhibition and euphoria; the second factor was integrated for disorders of appetite and apathy and the third factor included anxiety and aberrant motor behavior. CONCLUSIONS: As in samples from other countries neuropsychiatric symptoms are common in Mexican elderly with dementia in non-institutionalized population, they may be auxiliary as indicators of severity of dementia and their grouping is related to 1) behavioral disorders, 2) vegetative symptoms and apathy, and 3) symptoms of anxiety.

Anosognosia in Amnestic Mild Cognitive Impairment Is Related to Diminished Hippocampal Volume Comparable to Alzheimer's Disease Dementia: Preliminary MRI Findings.

Although the presence of anosognosia in amnestic mild cognitive impairment (aMCI) may be predictive of conversion to Alzheimer's disease (AD), little is known about its neural correlates in AD and aMCI. Four different groups were compared using volumetric and diffusion magnetic resonance imaging metrics in regions of interest (hippocampus and cingulum cortex gray matter, cingulum bundle white matter): aMCI subjects with anosognosia (n = 6), aMCI subjects without anosognosia (n = 12), AD subjects with anosognosia (n = 6), and AD subjects without anosognosia (n = 9). aMCI subjects with anosognosia displayed a significantly lower gray matter density (GMD) in the bilateral hippocampus than aMCI subjects without anosognosia, which was accounted for by bilateral hippocampal differences. Furthermore, we identified that the mean hippocampal gray matter density of aMCI subjects with anosognosia was not statistically different than that of AD subjects. The groups of aMCI and AD subjects with anosognosia also displayed a lower GMD in the bilateral cingulum cortex compared to subjects without anosognosia, but these differences were not statistically significant. No statistically significant differences were found in the fractional anisotropy or mean diffusivity of the hippocampus or cingulum between subjects with and without anosognosia in aMCI or AD groups. While these findings are derived from a small population of subjects and are in need of replication, they suggest that anosognosia in aMCI might be a useful clinical marker to suspect brain changes associated with AD neuropathology.

Epidemiología descriptiva y cambios en la frecuencia de tumores astrocíticos en el Instituto Nacional de Neurología y Neurocirugía de México / Descriptive epidemiology and frequency variations of astrocytic tumors in the National Institute of Neurology and Neurosurgery of Mexico

Resumen: Objetivo: Determinar distribución, localización y cambios de la frecuencia de tumores astrocíticos (TA) en un instituto mexicano de neurología. Material y métodos: Se revisaron los registros institucionales de TA de cinco décadas. Se compararon las relaciones TA/egresos quirúrgicos (EQ) y TA/total de tumores del sistema nervioso central (TSNC) de 1995 a 2014. Resultados: Se analizaron 2 287 TA (1 356 en hombres y 931 en mujeres). El glioma más común fue el glioblastoma multiforme (GBM), que estuvo presente en adultos jóvenes con una frecuencia mayor a la reportada en otros estudios. La relación TA/EQ y TA/TNSC fue similar entre 1995 y 2014. Conclusiones: En general, la frecuencia de TA atendidos en el Instituto es similar a la reportada internacionalmente. No obstante, los casos de TA en el subgrupo de adultos jóvenes con GBM son más frecuentes (40%) que las incidencias reportadas en otros estudios (menores al 5%). No se encontró variación significativa en la frecuencia de TA durante las últimas dos décadas.

Abstract: Objective: To determine distribution, localization and frequency variations of astrocytic tumors (AT) in a Mexican Institute of neurology. Materials and methods: Institutional registries of AT from five decades were analyzed. AT/Surgical discharges (SD) and AT/Central Nervous System Tumors (CNST) from 1995 to 2014 were compared. Results: Two thousand two hundred and eighty-seven AT (1 356 men and 931 women) were analyzed. The most common glioma was glioblastoma multiforme (GBM), found in young adults with a higher frequency to that reported in other studies. Relation of AT/SD, as well as, relation of AT/CNST was similar between 1995 and 2014. Conclusions: In general, the frequency of AT attended at the Institute is similar to that found worldwide, being only higher the number of GBM in younger adults. There was not significant variation in the frequency of AT during the time studied.

Validación de un punto de corte para la versión breve de la Escala de Depresión del Centro de Estudios Epidemiológicos en adultos mayores mexicanos / Validation of a cutoff point for the short version of the Depression Scale of the Center for Epidemiologic Studies in older Mexican adults

Objetivo. Identificar un punto de corte válido para la Escala de Depresión del Centro de Estudios Epidemiológicos (CES-D) de siete reactivos, que permita clasificar a los adultos mayores según presencia/ausencia de síntomas depresivos clínicamente significativos. Material y métodos. Estudio de tamizaje con 229 adultos mayores residentes de los estados de Morelos y Tlaxcala en México, que fueron parte de la muestra de la Encuesta Nacional de Salud y Nutrición, 2012. Se estimó la sensibilidad y especificidad asociada con el punto de corte seleccionado usando los criterios diagnósticos del ICD-10 (International Classification of Diseases, 10th revision) y del DSM-IV (Diagnostic and Statistical Manual of Mental Disorders, fourth edition). Resultados. El punto de corte estimado fue CES-D=5. De acuerdo con el ICD-10, los valores obtenidos de sensibilidad y especificidad fueron de 83.3 y 90.2%, y un valor ROC de 87% y, según el DSM-IV, los valores fueron 85, 83.2, y 84%, respectivamente. Conclusiones. La versión abreviada del CES-D puede ser utilizada como una prueba de tamizaje para identificar casos probables de adultos mayores con síntomas depresivos clínicamente significativos.

Objective. To identify a valid cutoff point associated with Center for Epidemiologic Studies, Depression Scale (CES-D) of seven items, which allows the classification of older adults according to presence/absence of clinically significant depressive symptoms. Materials and methods. Screening study with 229 older adults residing in two states of Mexico (Morelos and Tlaxcala), which were part of the sample from the National Survey of Health and Nutrition, 2012. We estimated the sensitivity and specificity associated with the selected cutoff points using the diagnostic criteria of ICD-10 (International Classification of Diseases, 10th revision) and DSM-IV (Diagnostic and Statistical Manual of Mental Disorders, fourth edition). Results. The cutoff point estimated was CES-D=5. According to the ICD-10 sensitivity and specificity were 83.3 and 90.2%, and ROC was 87%. Using DSM-IV, the values were 85, 83.2, and 84%, respectively. Conclusions. The short version of the CES-D can be used as a screening test to identify probable cases of older adults with clinically significant depressive symptoms.