[Clustering of cognitive domains among older adults with HIV]. / Agrupación de dominios cognitivos en personas mayores con VIH.

Background: Age and HIV are synergistic risk factors for conditions such as HIV-associated neurocognitive disorders (HAND). Yet, it is unclear whether OAWH display different cognitive profiles for HAND. Objective: To describe the cognitive patterns of OAWH treated with combined antiretroviral therapy (cART). Methods: Cross-sectional study that included 330 participants with HIV, aged 50 years or older, cared for at a tertiary care hospital in Mexico City. A short neuropsychological test battery was used to assess a wide spectrum of cognitive functions. The optimal number of cognitive clusters was determined by the silhouette method and a minimization of the Bayesian information criterion. Results: Participants' mean age was 58.8 years (SD = 6.6), and 12.1% were women. A 3-cluster solution yielded stable Jaccard coefficients (p > 0.70). Cluster 1 showed more significant impairment in visual and verbal memory domains, whereas participants in cluster 3 showed significant impairment in language, and abstraction. Cluster 2 showed no predominance of any domain for alterations. Conclusions: There are different cognitive profiles among OAWH with HAND. These differences may be due to individual patterns of HIV-related and non-HIV-related factors.

Antecedentes: La edad y el VIH constituyen factores de riesgo sinérgicos de afecciones como los trastornos neurocognitivos asociados al VIH (TNAV). No se ha esclarecido si las personas mayores con VIH presentan perfiles cognitivos diferentes en caso de padecer TNAV. Objetivo: Describir los patrones cognitivos de adultos mayores con VIH tratados con terapia antirretroviral combinada (TARc). Métodos: Estudio transversal que incluyó a 330 participantes con VIH, de 50 años o más, atendidos en un centro hospitalario de tercer nivel en la Ciudad de México. Se utilizó una batería neuropsicológica corta estandarizada a fin de evaluar un amplio espectro de funciones cognitivas. Se determinó el número óptimo de grupos de dominios cognitivos a partir del método de la silueta y minimización del criterio de información bayesiano. Resultados: La edad promedio de los participantes fue de 58.8 años; las mujeres constituyeron 12.1 %. Una solución de tres grupos produjo coeficientes de Jaccard estables (p > 0.70). El grupo 1 mostró deterioro más significativo en la memoria visual y verbal, en tanto que el grupo 3 mostró deterioro significativo en el lenguaje y la abstracción. En el grupo 2 no se registró predominio de ningún dominio en cuanto a alteraciones. Conclusiones: Existen perfiles cognitivos diferentes entre las personas mayores con VIH y TNAV. Estas diferencias pueden deberse a patrones individuales de factores relacionados o no con el VIH.

Association between Helicobacter pylori infection and incident risk of dementia: The AMI cohort.

BACKGROUND: Chronic infectious diseases are increasingly being considered as potential contributors to dementia risk. Among those infections, Helicobacter pylori, the main cause of chronic gastritis worldwide, has been suggested. As the prevalence of H. pylori infection has decreased, the main objective of this work was to reconsider the association between H. pylori infection and the risk of incident dementia, including Alzheimer's disease. METHODS: Prospective cohort of 689 older (≥65 years) agricultural workers from Southwest France. Descriptive and comparative analyses were performed according to H. pylori status determined by serology at baseline. The risk of incident dementia according to H. pylori status over a 7-year follow-up was explored by survival analyses: Kaplan-Meier curve and Cox proportional hazards models. RESULTS: Two-hundred (29.0%) participants were H. pylori-positive at baseline. Compared to H. pylori-negative participants, they showed worse cognitive performances at baseline. Eighty-five incident dementia cases were diagnosed during the follow-up period. After adjustment for age, sex, education, apolipoprotein ε4, and several cardiovascular risk factors, H. pylori remained associated with an increased risk of dementia (HR 1.70, 95% CI, 1.05-2.74). The risk was stronger for Alzheimer's disease (HR 2.85, 95% CI, 1.58-5.12). CONCLUSIONS: Despite an observed decrease in H. pylori infection prevalence, this study provides evidence for the association between H. pylori infection and dementia. These results should encourage further research on the mechanisms underlying the contribution of infectious diseases to pathological brain aging, especially the influence of gut inflammation on the brain.

Social connections and depressive symptoms among older adults during the initial lockdown period for COVID-19 / Conexiones sociales y síntomas depresivos entre adultos mayores durante el primer período de confinamiento por COVID-19

Abstract Introduction Little information from developing countries during the first lockdown for COVID-19 is available. We hypothesized that the use of communication tools, and not living alone would provide a protective effect against DS. Objective To determine the association between social connections and depressive symptoms (DS) during the first lockdown period among Mexican community-dwelling older adults. Method Cross-sectional phone survey including 269 participants aged 65 years or older. Participants were asked about their social connections and the presence of DS during the first lockdown for COVID-19. Results Mean age was 83.2 (SD = 6.7). Compared with those without DS, those with DS reported a greater number of phone calls or videocalls although this was not statistically significant. However, when stratifying by housing situation, only the participants who lived alone and that received less calls from friends had more DS (p = .04). Discussion and conclusion Living alone allowed the participants not to have much contact with family and this caused friends to represent the most important social relationship outside the home. We hypothesize that the means to stay socially active for older adults in Latin America are different and have a different impact. Because, DS only were present among the participants who reported living alone and having fewer calls from friends during the confinement period.

Resumen Introducción Hay poca información disponible sobre los países en desarrollo durante el primer período de confinamiento por COVID-19. Planteamos la hipótesis de que el uso de herramientas de telecomunicación y vivir acompañado proporciona un efecto protector frente a la presencia de síntomas depresivos (SD). Objetivo Determinar la asociación entre las conexiones sociales y los SD durante el primer período de confinamiento en adultos mayores mexicanos que viven en la comunidad. Método A través de un estudio transversal, 269 participantes de 65 años o más completaron una encuesta telefónica sobre sus conexiones sociales y la presencia de SD durante el primer período de confinamiento por COVID-19. Resultados La edad media fue de 83.2 (DE = 6.7). En comparación con los que no tenían SD, los que tenían SD reportaron un mayor número de llamadas telefónicas o videollamadas, pero esto no fue estadísticamente significativo. Sin embargo, al estratificar por situación de vivienda, los participantes que vivían solos y que recibían menos llamadas de amigos tenían más SD (p = .04). Discusión y conclusión Vivir solo permitió a los participantes no tener mucho contacto con la familia y esto provocó que los amigos representaran la relación social más importante fuera del hogar. Creemos que los medios para mantenerse socialmente activos de los adultos mayores en América Latina son diferentes y tienen un impacto diferente. Debido a que los SD solo estuvieron presentes entre los participantes que reportaron vivir solos y tener menos llamadas de amigos durante período de confinamiento.

Clinical decision making in older adults with COVID-19 in developing countries: looking beyond chronological age

ABSTRACT Background: The coronavirus disease 2019 (COVID-19) has been declared a global pandemic. Older adults have been found as a vulnerable group for developing severe forms of disease and increased mortality. Objective: The objective of the study was to propose a pathway to assist the decision-making process for hospital resource allocation for older adults with COVID-19 using simple geriatric assessment-based tools. Methods: We reviewed the available literature at this point of the COVID-19 outbreak, focusing in older adult care to extract key recommendations for those health-care professionals who will be treating older adults in the hospital emergency ward (HEW) in developing countries during the COVID-19 pandemic. Results: We listed a series of easy recommendations for non-geriatrician doctors in the HEW and suggested simple tools for hospital resource allocation during critical care evaluation of older adults with COVID-19 in low- and middle-income countries. Conclusions: Age must not be used as the sole criterion for resource allocation among older adults with COVID-19. Simple and efficient tools are available to identify components of the comprehensive geriatric assessment, which could be useful to predict outcomes and provide high-quality care that would fit the particular needs of older adults in resource-limited settings amidst this global pandemic.