Asociación entre la salud oral y el deterioro cognitivo leve en adultos mayores

Introducción: En la medida que se incrementa la población de adultos mayores, aumenta la prevalencia, aumenta la prevalencia del deterioro cognitivo. Recientemente, se ha introducido la mala salud oral entre los factores de riesgo potenciales. Objetivo: Determinar la asociación entre la salud oral y el deterioro cognitivo leve en adultos mayores de una comunidad de la provincia de Santiago de Cuba. Métodos: Se realizó un estudio observacional, analítico y retrospectivo, de tipo casos y controles en el período comprendido entre enero y julio del año 2023. La población de estudio estuvo constituida por 257 adultos mayores que vivían en esta comunidad, de los cuales se escogieron 40 casos con diagnóstico de deterioro cognitivo leve, según los criterios de Petersen. Se seleccionaron tres controles por cada caso, 120 adultos mayores con aproximadamente las mismas características que el caso. Se precisó la fuerza de asociación de cada factor de riesgo. Resultados: Se halló una asociación significativa entre padecer deterioro cognitivo leve y presentar un número de 1 a 9 dientes. El dolor oral se presentó con mayor frecuencia en el 72,5 % de los casos. No recordar la última visita al estomatólogo fue causa de deterioro cognitivo leve en el 42,5 %. Cepillarse irregularmente se asoció 4,1 veces más con el riesgo de desarrollar esta afección. Conclusiones : Existe una asociación entre la salud oral y el deterioro cognitivo leve en los adultos mayores. Tener menos dientes y referir dolor oral fueron factores de riesgo importantes para presentar deterioro cognitivo. La visita al estomatólogo y el cepillado de dientes irregular influyeron negativamente en la enfermedad. Sin embargo, el uso de prótesis dentales fue un factor protector para el deterioro cognitivo leve.

Introduction: Along with the increase in the population of older adults, the prevalence of cognitive impairment is increasing. Recently, poor oral health has been introduced among potential risk factors. Objective: To determine the association between oral health and mild cognitive impairment in older adults in a community in the province of Santiago de Cuba. Methods: An observational, analytical and retrospective case-control study was carried out from January to July 2023. The study population consisted of 257 older adults living in this community, from which 40 cases were selected with a diagnosis of mild cognitive impairment, according to Petersen's criteria. Three controls were selected for each case, 120 older adults with approximately the same characteristics as the case. The strength of association of each risk factor was determined. Results: A significant association was found between having mild cognitive impairment and having 1 to 9 teeth. Oral pain was more frequent in 72.5% of the cases. Not remembering the last visit to the dentist was a cause of mild cognitive impairment in 42.5 %. Irregular brushing was 4.1 times more associated with the risk of developing this condition. Conclusions: There is an association between oral health and mild cognitive impairment in older adults. Having fewer teeth and reporting oral pain were important risk factors for cognitive impairment. Visiting the dentist and irregular tooth brushing had a negative influence on the disease. However, the use of dental prosthetics was a protective factor for mild cognitive impairment.

Alertamientos y movimientos periódicos de las piernas durante las etapas de sueño y deterioro cognitivo leve en adultos mayores. Estudio preliminar / Arousals and periodic leg movements during sleep stages and mild cognitive impairment in older adults: a preliminary study

RESUMEN La fragmentación del sueño puede asociarse con distintas enfermedades, entre ellas, la demencia. En este sentido, la fragmentación de sueño, indicada por el índice de alertamientos y/o movimientos periódicos de las piernas (MPP), podría ser un marcador temprano de deterioro cognitivo leve (DCL), un síndrome precursor de la demencia. El objetivo del presente estudio fue medir el índice de prevalencia de los alertamientos y de los MPP durante el sueño en un grupo control y un grupo con DCL, así como determinar si hay diferencia entre los grupos en ambos índices y establecer si existe una correlación entre los dos fenómenos. En 9 participantes (3 mujeres controles y 3 mujeres con DCL; y 3 hombres con DCL) (edad: 69.1 ± 5; años de educación: 8 ± 2) se registró una noche de polisomnografía. Se obtuvieron los índices por hora de alertamientos y para cada etapa de sueño, así como los MPP globales y por hora; además se realizaron análisis entre y dentro de cada grupo. Se encontró una correlación positiva y un mayor número de MPP que de alertamientos durante toda la noche en los participantes con DCL. Conocer la prevalencia y asociación de ambos fenómenos contribuye en la formulación de una evaluación más cuidadosa y profunda de los adultos mayores en riesgo de desarrollar DCL y/o demencia.

ABSTRACT Sleep fragmentation may be associated with several diseases, including dementia. In this sense, sleep fragmentation, indicated by the rates of arousals and/or periodic leg movements (PLM), could be an early marker of Mild Cognitive Impairment (MCI), a syndromic stage prior to dementia. Therefore, the objective of this study was to compare the index of PLM with that of arousals and correlate both indexes in people with MCI and without MCI during all sleep stages. In 9 participants (3 control women and 3 women with MCI; and 3 men with MCI) (ages: 69.1 ± 5; years of education: 8 ± 2), one night of polysomnography was performed. Hourly rates of arousals and PLM were scored from each sleep stage. Analyses were performed within and between PLM and arousals for each group. Significant differences and a positive correlation were found between the arousal and the PLM rates for the group with MCI during the whole night. Knowledge of the prevalence and the association of both phenomena may contribute to a more careful and thorough evaluation of older adults at risk of developing MCI and/or dementia.

Asociación entre los niveles de vitamina B12 y el deterioro cognitivo en personas mayores / Association between vitamin B12 levels and cognitive impairment in older adults

Resumen Introducción: Aún es controversial si la deficiencia de vitamina B12 se asocia a alteraciones cognitivas. Objetivo: Conocer la asociación entre los niveles séricos de vitamina B12 y el desempeño cognitivo. Métodos: Se incluyeron 241 personas ≥ 60 años con medición de niveles séricos de vitamina B12. Se realizó evaluación física y cognitiva y se formaron tres grupos: cognición normal (CN), deterioro cognitivo leve (DCL) y demencia. Los niveles de vitamina B12 se clasificaron en suficiencia (> 400 pg/mL), deficiencia subclínica (201-400 pg/mL) y deficiencia absoluta (≤ 200 pg/mL). Se realizó análisis de regresión lineal multivariado para evaluar la asociación entre función cognitiva y niveles de vitamina B12 después de controlar las variables confusoras. Resultados: La media de edad fue 81.4 ± 8.0 años; 68 % fue del sexo femenino; 17.8 y 39.8 % presentaron deficiencia absoluta y subclínica de vitamina B12; 80 individuos (33 %) cumplieron los criterios de DCL y 70 (29 %), de demencia. Después de ajustar por edad, sexo y escolaridad, los sujetos con DCL y demencia tuvieron niveles más bajos de vitamina B12 comparados con aquellos con CN (p = 0.019). Conclusiones: Se observó asociación estadísticamente significativa entre el desempeño cognitivo global y los niveles bajos de vitamina B12.

Abstract Introduction: Whether vitamin B12 deficiency is associated with cognitive impairment remains controversial. Objective: To determine the association between vitamin B12 serum levels and cognitive performance. Methods: Two-hundred and forty-one adults aged ≥ 60 years who had serum vitamin B12 serum levels measurement were included. Physical and cognitive evaluation was carried out, and three groups were formed: normal cognition (NC), mild cognitive impairment (MCI) and dementia. Vitamin B12 levels were classified as sufficiency (> 400 pg/mL), subclinical deficiency (201-400 pg/mL), and absolute deficiency (≤ 200 pg/mL). Multivariate linear regression analysis was used to evaluate the association between cognitive function and vitamin B12 levels after controlling for confounding variables. Results: Mean age was 81.4 ± 8.0 years; 68% were females; 17.8 % and 39.8% had absolute and subclinical vitamin B12 deficiency, respectively; 80 individuals (33%) met the criteria for MCI, and 70 (29%), for dementia. Those with MCI and dementia had lower vitamin B12 levels in comparison with those with NC after adjusting for age, gender and educational level (p = 0.019). Conclusions: A statistically significant association was observed between global cognitive performance and levels of vitamin B12.

Revisiting global cognitive and functional state 13 years after a clinical trial of lithium for mild cognitive impairment

Objectives: To re-evaluate a sample of older adults enrolled in a randomized controlled trial of lithium for amnestic mild cognitive impairment (MCI) after 11 to 15 years, re-assessing their current (or last available) global cognitive and functional state. Methods: We recalled all former participants of the Lithium-MCI trial conducted by our group between 2009 and 2012 to perform a single-blinded, cross-sectional evaluation of their global clinical state to compare the long-term outcome of those who received lithium vs. those who received placebo. Results: Of the original sample (n=61), we were able to reach 36 participants (59% of retention), of whom 22 had previously received lithium (61% of the recall sample) and 14 (39%) had received placebo. Since 30.5% of the recalled sample was deceased, psychometric data were collected only for 69.5% of the participants. We found statistically significant differences in current mean Mini Mental State Examination score according to previous treatment group (25.5 [SD, 5.3] vs. 18.3 [SD, 10.9], p = 0.04). The lithium group also had better performance in the phonemic Verbal Fluency Test than the control group (34.4 [SD, 14.4] vs. 11.6 [SD, 10.10], p < 0.001). Differences in these measures also had large effect sizes, as shown by Cohen's d values of 0.92 and 1.78, respectively. Conclusion: This data set suggests that older adults with amnestic MCI who had been treated with lithium during a previous randomized controlled trial had a better long-term global cognitive outcome than those from a matched sample who did not receive the intervention.

Intervenciones cognitivas a través de realidad virtual en personas con Deterioro Cognitivo Leve: Una Revisión Sistemática

Introducción: La posibilidad de reversión del Deterioro Cognitivo Leve (DCL) ha generado diversas investigaciones en búsqueda de tratamiento, entre ellas la estimulación cognitiva a través de realidad virtual (RV). No obstante su uso, no existe aún evidencia acerca de las modalidades y efectos en personas con DCL. Objetivo: Sistematizar las características de los estudios que han utilizado intervenciones cognitivas con RV en personas con DCL, describir sus efectos y establecer recomendaciones para futuras investigaciones en base a las limitaciones reportadas. Métodos: revisión sistemática de estudios publicados entre 2010 y 2020, en las bases de datos Web of Science, Scopus y Pubmed. Resultados: Se identificaron 14 estudios con programas que emplearon mayoritariamente RV de tipo inmersiva, con el "supermercado" como escenario virtual más frecuente. En siete trabajos se intervino una función cognitiva, siendo la memoria y las funciones ejecutivas las más intervenidas. Los instrumentos de evaluación se concentraron en medidas cognitivas, con escasa evaluación de variables neuropsiquiátricas y de calidad de vida. Trece estudios informaron mejoras a nivel cognitivo general o por dominio específico. Conclusiones: La utilización de RV, inmersiva y no inmersiva, ha tenido resultados positivos en el rendimiento cognitivo general o específico por dominio, de personas con DCL, sin embargo, debido a la incipiente y limitada evidencia de su uso en personas con esta patología, no es posible determinar la sostenibilidad de estos resultados y la generalización de estas intervenciones hacia las actividades de la vida diaria. Se recomienda realizar intervenciones con entornos reales y seguimiento post-intervención.

Introduction: The possibility of Mild Cognitive Impairment (MCI) reversal has generated numerous studies in search of treatment, including cognitive stimulation through virtual reality (VR). Despite its use, there is still no evidence about the modalities and effects in people with MCI. Aim: To systematize the characteristics of the studies that have used cognitive interventions with VR cognitive in people with MCI, describe their effects and to establish recommendations for future research based on the limitations reported. Methods: systematic review of studies published between 2010 and 2020, in the Web of Science, Scopus and Pubmed databases. Results: 14 studies were identified with programs that mostly used immersive VR, with the "supermarket" as the most frequent virtual scenario. In seven studies only one cognitive function was involved, with memory and executive functions being the most intervened. The assessment instruments focused on cognitive measures, with little assessment of neuropsychiatric and quality of life variables. Thirteen studies reported improvements on the general cognitive level or by specific domain. Conclusions: The use of immersive and non-immersive VR has had positive results in the general or domain-specific cognitive performance of people with MCI, however, due to the incipient and limited evidence of its use in people with this pathology, it is not possible to determine the sustainability of these results and the generalization of these interventions regarding daily living activities. Interventions with real environments and post-intervention follow-up are recommended.

Gait characteristics of middle-aged and eldrly people with mild cognitive impairmentin in community / 中风与神经疾病杂志

Gait characteristics of middle-aged and eldrlypeople with mild cognitive impairmentin in community@#Objective To explore the change of gait of middle-aged and elderly people with mild cognitive impairment in the community,the correlation between gait and cognitive domain,and the role of gait in early recognition of cognitive decline. Methods 140 people over 40 years old in Tongxing Village,Yancheng City,Jiangsu Province were enrolled.The subjects were divided into normal cognitive group (n=64) and mild cognitive impairment group(n=76)through the Montreal Cognitive Assessment and the Minimum Mental State Examination,and gait tests were conducted at the same time.The data were collected and statistically analyzed to explore the difference of gait indicators between the two groups,the relationship between gait indicators and cognitive domains,and the ability of gait indicators to recognize mild cognitive impairment. Results The gait of the mild cognitive impairment group was worse than that of the normal cognitive group in terms of space (stride length,step height,step width) and time (step speed,stride speed,swing speed).Partial correlation analysis showed that step width was negatively correlated with delayed recall;Step size,step width and delayed recall,step height and naming were positively correlated.The logistic regression model constructed by step speed,stride length,stride speed,swing speed,step height and step width can reliably identify the existence of MCI (AUC=0.761,95%CI 0.683-0.840,P<0.05). Conclusion In the middle-aged and elderly community,the spatial and temporal performance of gait of patients with mild cognitive impairment is worse than that of the normal cognitive population.There is a close relationship between spatial indicators and delayed recall and naming.The temporal and spatial characteristics of gait have the potential to identify cognitive decline at an early stage.

Mediating role of neutrophil-lymphocyte ratio in association between polycyclic aromatic hydrocarbons and mild cognitive impairment / 环境与职业医学

Background As a group of environmental pollutants, polycyclic aromatic hydrocarbons (PAHs) are neurotoxic and may cause mild cognitive impairment (MCI) by inducing inflammation. Whether neutrophil-lymphocyte ratio (NLR), an inflammatory indicator, plays a mediating role in the relationship between PAHs exposure and MCI is unclear yet. Objective To investigate a potential mediating role of NLR in the association between exposure to PAHs and MCI in coke oven plant workers. Methods Eleven urine hydroxylated PAHs (OH-PAHs) of 530 coke oven plant workers were determined by high performance liquid chromatography tandem mass spectrometry. NLR was derived from participants' routine blood examination results using a fully automated haematology analyser. The associations between urinary OH-PAHs and MCI were analyzed by binary logistic regression, the associations between urinary OH-PAHs and NLR were analyzed by multiple linear regression, and the role of NLR in the relationship between urinary OH-PAHs and MCI was evaluated by mediating effect analysis. Results After controlling for confounding factors and other OH-PAHs, the results of binary logistic regression showed that for every e-fold (e is the base of the natural logarithm) increase in the concentration of 2-hydroxynaphthalene (2-OHNap) and 1-hydroxyphenanthrene (1-OHPhe), the OR (95%CI) values of reporting MCI positive were 1.21 (1.02, 1.43) and 1.25 (1.04, 1.51) respectively. For each unit increase of NLR, the OR (95%CI) of reporting MCI positive was 1.56 (1.12, 2.18). The results of multiple linear regression showed that each unit increase in natural log-transformed levels of 1-OHPhe was associated with 0.05 (95%CI: 0.01, 0.10) increase of NLR. The results of mediating effect analysis showed that the association between urinary 1-OHPhe and MCI was partially mediated by peripheral blood NLR, with a mediation ratio of 9.8%. Conclusion Exposure to PAHs in coke oven plant workers may increase the risk of reporting MCI positive partially through increased NLR in peripheral blood.

Effects of mild cognitive impairment on perceived facial trustworthiness for older adults / 中华行为医学与脑科学杂志

Objective:To explore the effects of mild cognitive impairment (MCI) on perceived facial trustworthiness for older adults.Methods:From May to June 2019, 30 young subjects (young group) were recruited, and 30 young older adults (young elderly group), 30 middle older adults (middle elderly group), and 30 elderly (elderly group) with normal cognition were recruited. At the same time, 30 older adults with normal cognition (cognitive normal elderly group) and 30 older adults with MCI (MCI elderly group) were recruited. All subjects were scored on the trustworthiness of young and elderly faces.SPSS 26.0 software was used to conduct a multivariate analysis of variance on the data to explore the differences in perceived facial trustworthiness among elderly people of different ages and elderly people with different cognitive function.Results:(1) A comparison of the facial trustworthiness scores of young and elderly faces among the young group, young elderly group, middle elderly group, and elderly group showed that, interaction between face age and age was significant ( F(3, 116)=6.30, P=0.001), the main effect of face age was significant ( F(1, 116)=23.18, P<0.001), and the main effect of age group was significant ( F(3, 116)=11.88, P<0.001). Simple effect analysis showed that the facial trustworthiness scores of elderly faces in the young elderly group (5.02±0.85), middle elderly group (5.15±0.55), and the elderly group (4.87±1.03) were higher than that in the young group (3.74±0.71), and with a statistically significant difference (all P<0.001). There were no significant differences in the facial trustworthiness scores of elderly faces among the young elderly group, middle elderly group, and elderly group (all P>0.05). There were no statistically significant differences in the facial trustworthiness scores of young face among different age groups ( P>0.05). (2)The comparison of facial trustworthiness scores among the young group, cognitive normal elderly group, and the MCI elderly group showed that, the interaction between face age and cognition was significant ( F(2, 87)=8.33, P<0.001), the main effect of face age was significant ( F(1, 87)=5.97, P<0.01), and the main effect of cognition was significant( F(2, 87)=39.37, P<0.001). Simple effect analysis showed that the facial trustworthiness scores of elderly faces in cognitive normal elderly group was higher than those in the young group and the MCI elderly group( P<0.001). There were no significant differences in the facial trustworthiness scores of elderly faces among young group and the MCI elderly group ( P=0.191). The facial trustworthiness scores of young faces in cognitively normal elderly group and young group were higher than those in the MCI elderly group( P<0.05). There was no statistically significant difference in the facial trustworthiness scores of young faces between cognitively normal elderly group and young group ( P=0.134). Conclusion:There is a positive effect on the perceived facial trustworthiness in older adults with normal cognition, but there is no positive effect on the perceived facial trustworthiness in the older adults with MCI. Cognitive decline affects perceived facial trustworthiness in the elderly.

Meta-analysis of the association between brain-derived neurotrophic factor in peripheral blood and Alzheimer's disease / 中华行为医学与脑科学杂志

Objective:To evaluate association of peripheral blood brain-derived neurotrophic factor (BDNF) with Alzheimer's disease (AD) .Methods:Databases including Pubmed, Cochrane library, Web of science, Embase, China National Knowledge Infrastructure, CBM disc, VIP-CSTJ and Wanfang Data were used to collect case-control studies related to the concentration of BDNF in peripheral blood of dementia patients with Alzheimer's type(DAT) and mild cognitive impairment(MCI). After extracting data and appraising the quality of the included studies, meta-analysis were conducted using Review Manager 5.3 and CMA 3.0.Results:A total of 51 articles were included in the analysis, with a total subjects of 7 182, including 2 673 subjects in DAT group, 1 506 subjects in MCI group, and 3 003 subjects in control group.The Meta-analysis showed that the levels of peripheral blood BDNF in patients with DAT were significantly lower than normal control group(SMD=-0.71, 95% CI : -0.99--0.43, P<0.001) ( n=5 111), and there were no statistical differences in peripheral blood BDNF levels between MCI group and control group and between DAT group and MCI group.The subgroup analysis showed that the level of serum BDNF in patients with DAT (SMD=-0.85, 95% CI: -1.15--0.55, P<0.001)( n=4 425) and MCI(SMD=-0.38, 95% CI: -0.62--0.14, P=0.002)( n=2 476) was significantly lower than that in normal control group, and the level of serum BDNF (SMD=-0.76, 95% CI: -1.37--0.16), P=0.01)( n=1 630) in patients with DAT was lower than that in MCI; However, there were no statistical difference among DAT, MCI and control groups in the level of plasma BDNF( P>0.05). Conclusion:The patients with DAT and mild cognitive impairment have lower level of serum BDNF, which suggesting that serum BDNF level may be a potential biomarker for early diagnosis of AD.

Status and associated factors of mild cognitive impairment among the elderly in Shanghai community / 上海预防医学

ObjectiveTo explore the status of mild cognitive impairment （MCI） among the elderly in Shanghai communities， and to identify the factors associated with MCI. MethodsThe Montreal Cognitive Assessment-Basic （MoCA-B） was used to screen for MCI in elderly adults. Logistic regression analysis was conducted to identify the factors associated with MCI. ResultsAmong 629 participants， 226 （35.90%） were positive for MCI. Older age （OR=1.04， 95%CI： 1.01-1.07）， lower family income （average OR=2.20， 95%CI： 1.01-4.80； poor OR=2.59， 95%CI： 1.03-6.50）， hearing impairment affecting daily life （OR=1.86， 95%CI： 1.19-2.91）， and anxiety symptoms （OR=1.58， 95%CI： 1.02-2.44） were associated with the positive for MCI. Living in central urban area （OR=0.57， 95%CI： 0.37-0.89） and having higher social support （OR=0.97， 95%CI： 0.94-1.00） were protective factors for MCI. ConclusionThe current status of MCI among the elderly in Shanghai communities is not optimistic. It is important and necessary to establish the cognitive-friendly community for the elderly.

Study on the correlation between marital status and mild cognitive impairment in older adults / 中华老年医学杂志

Objective:To explore the relationship between marital status and mild cognitive impairment in older adults.Methods:This study is a cluster random sampling.From January to December 2020, a questionnaire survey was conducted among older adults aged 60 years and over in four cities of Hebei Province.Finally, 2690 older adults with mild cognitive impairment and normal cognitive function were enrolled.The older adults were divided into 2 groups according to their marital status: married and living with their spouses(group E1), divorced or living alone(group E2). The mini-mental state examination(MMSE)scores of older adults in the two groups were compared.Moreover, the cognitive differences of older adults between the two groups and the interaction of marital status, social activities and life events on cognitive outcomes were analyzed.Results:The married older adults with partners had better cognitive preservation( P<0.01). The more life events were more likely to cause cognitive impairment( P<0.01), and the interaction of marital status, social activities and life events had a significant impact on cognition( P<0.01). Older men who were married and lived with spouse had better cognition than older women who were married and lived with spouse( P<0.05 in Model 3). The cognition of widowed elderly women was better than those of widowed elderly men( P<0.1 in Model 1; P<0.1 in Model 2). Among elderly men, the cognition of those married and living with spouse was better than that those of widowed( P<0.01 in models 1 and 2, P<0.1 in model 3). Among elderly women, those married and living with spouse had better cognitive outcomes than those widowed( P<0.01 in Model 1, P<0.01 in Model 2). Conclusions:Marital companionship is a protective factor for the cognition of older adults, and there are gender differences in the impact of marital status on cognition in late life.

Association between mild cognitive impairment and all-cause death in community-dwelling middle-aged and older adults / 中华老年医学杂志

Objective:To explore the association between mild cognitive impairment(MCI)and the risk of all-cause death among community middle-aged and older adults, and to provide evidence for early identification of high-risk populations.Methods:From September to November 2011, the residents aged 55 years and middle-aged and older in five urban communities were selected as the research objects by typical sampling method.The baseline survey of general information questionnaire, Mini-Mental State Examination(MMSE), activity of daily Living Scale(ADL), Geriatric Depression Scale(SDS)was carried out and the physical examination was performed.Mild cognitive impairment at the time of enrollment was the exposure factor.In 2017, 2019 and 2021, Deaths were followed up through home visits and search for death surveillance information systems.COX regression model was used to analyze the influencing factors for death.Results:A total of 1046 participants completed the follow-up and were included in the study.The baseline age was(66.4±6.6)years, and 199(19.0%)of them met the criteria for MCI.The average follow-up time was 112±16 months.During the follow-up period, 106 deaths were observed.The mortality rate was higher in participants with MCI(40 deaths, 21.1%)than those without MCI [(66 deaths, 10.1%), χ2=26.80, P<0.001)]. Participants with MCI had a shorter median survival time than those without MCI[(108.0±1.5) vs.(113.0±0.5)months, χlog-rank2=28.02, P<0.001]using the Kaplan-Meier method.Controlling for gender, age, and ethnicity, the Cox regression model revealed that MCI is associated with an increased risk of all-cause death( HR=1.98, 95% CI: 1.30-3.02, P=0.023). Conclusions:Mild cognitive impairment is an independent risk factor for all-cause death among community older adults.Early identification and intervention of MCI may have potential value in preventing premature death and prolonging life in middle-aged and older adults.

Effect of aluminum-fluoride interactions on overall cognitive function of aluminum plant workers / 环境与职业医学

Background Aluminum and fluoride are neurotoxic, and aluminum exposure alone is closely related to the overall cognitive function of operational workers. It is unclear about the effect of aluminum and fluoride interactions on cognitive function. Objective To evaluate a potential interaction effect of blood aluminum and urinary fluoride on the overall cognitive function of workers working in an aluminum plant. Methods Using cluster sampling, 230 workers in the electrolysis workshop of an aluminum group company in Shanxi Province were selected, and plasma aluminum concentrations were determined by inductively coupled plasma mass spectrometry (ICP-MS) and urinary fluoride by ion-selective electrode. The study participants were divided into a low blood aluminum group and a high blood aluminum group according to the median (M) of blood aluminum concentration, and a low urinary fluoride group and a high urinary fluoride group by a predetermined cutoff point (2.160 mg·L−1). The Montreal Cognitive Assessment-Beijing (MoCA-BJ) was used to assess overall cognitive function of the workers. Logistic regression model was used to analyze the relationship between blood aluminum, urinary fluoride, and mild cognitive impairment (MCI), including multiplicative interaction analysis and correlation analysis; R language was used to fit an additive interaction model of blood aluminum and urinary fluoride on MCI and to calculate synergy index (S), relative excess risk due to interaction (RERI), and attributable proportion due to interaction (API). Results Among the 230 operational workers, the median blood aluminum concentration (P25, P75) was 40.11 (25.16, 58.89) µg·L−1, and there were 104 cases of abnormal urinary fluoride, with an abnormality rate of 45.2%. There was a multiplicative interaction (OR=7.783, 95%CI: 1.377, 43.991) and no additive interaction (RERI=0.030, 95%CI: −0.498, 0.559; API=0.018, 95%CI: −0.279, 0.316; S=1.049, 95%CI: 0.519, 2.118) for the effect between blood aluminum and urinary fluoride on overall cognitive function of the workers. The logistic regression analysis showed that the risk of MCI was 12.105 (95%CI: 2.802, 52.287) times higher in workers with both high blood aluminum and high urinary fluoride than in those with low blood aluminum and low urinary fluoride, after adjusting for selected influencing factors. Conclusion Occupational exposure related high blood aluminum and high urinary fluoride are risk factors for cognitive dysfunction, and the coexistence of both indicators increases the risk of MCI in workers with occupational aluminum exposure, with a multiplicative interaction.

Research on mild cognitive impairment diagnosis based on Bayesian optimized long-short-term neural network model / 生物医学工程学杂志

The recurrent neural network architecture improves the processing ability of time-series data. However, issues such as exploding gradients and poor feature extraction limit its application in the automatic diagnosis of mild cognitive impairment (MCI). This paper proposed a research approach for building an MCI diagnostic model using a Bayesian-optimized bidirectional long short-term memory network (BO-BiLSTM) to address this problem. The diagnostic model was based on a Bayesian algorithm and combined prior distribution and posterior probability results to optimize the BO-BiLSTM network hyperparameters. It also used multiple feature quantities that fully reflected the cognitive state of the MCI brain, such as power spectral density, fuzzy entropy, and multifractal spectrum, as the input of the diagnostic model to achieve automatic MCI diagnosis. The results showed that the feature-fused Bayesian-optimized BiLSTM network model achieved an MCI diagnostic accuracy of 98.64% and effectively completed the diagnostic assessment of MCI. In conclusion, based on this optimization, the long short-term neural network model has achieved automatic diagnostic assessment of MCI, providing a new diagnostic model for intelligent diagnosis of MCI.

Lifestyle and mild cognitive impairment in aged people: Inhibitory effect of modifiable lifestyle in the progression of impairment

The process of aging usually accompanied with deterioration of physical and mental abilities resulting in gradual decline in cognitive function and increased risk of cognitive impairment. People experience age related dysfunctions, which is termed as Mild Cognitive Impairment. The values and attitudes exhibited as an impact of social, cultural, economic and environmental conditions and a set of health pertinent behaviour are collectively termed as Lifestyle. Modifiable lifestyle factors are those factors, which inhibit the progression of cognitive decline and can act as an aid to stabilize cognitive health and improve cognitive functioning. The present paper intends to review the inhibitory effect of modifiable lifestyle in cognitive impairment in aged people. An integrated review of literature of about 30 papers ranging from 2004 to 2020 performed from different sources namely Publish or Perish 7, Academia, Research Gate, PubMed, NIH- PA, Science Direct, PloS Medicine etc. Findings of the present review suggest that modifiable lifestyle factors, level of education, leisure activity, and appropriate sleep duration are some important factors that influence cognitive health in later life and reduces the risk of cognitive decline. Further, social isolation, depression, alcohol consumption, and smoking are some factors that act as risk factors and may enhance the progression of MCI. Professionals can intervene with elderly individuals or in a geriatric community by implementing some modifications in lifestyle that in turn may inhibit or delay the progression of cognitive decline. Geriatric health policy can be developed by policy makers considering the modifiable risk factors to manage the problem of cognitive impairment

Detección temprana de deterioro cognitivo leve en personas mayores durante la pandemia: protocolo cribado online / Early detection of mild cognitive impairment in older people during the pandemic: online screening protocol

Introducción: la pandemia COVID-19 ha tenido un gran impacto en la vida y en especial en las personas mayores. El objetivo del presente estudio fue explorar un protocolo de cribado online para detectar tempranamente Deterioro Cognitivo Leve en personas mayores. Métodos: fue de tipo cuantitativo y cualitativo. La muestra fue de 22 personas mayores de las comunas de Coronel y Lota, Región del Bio-bio. El protocolo estaba compuesto por: Cuestionario sociodemográfico, Test del Reloj Versión Cacho, Moca versión validada en Chile, Escala Depresión Yesavage y Test Acentuación de Palabras. El procedimiento consistió en la aplicación del protocolo a través de un Tablet o Laptop. Resultados: se encontró que la mayoría no presentaba deterioro cognitivo, pero si depresión. Conclusiones: se discute sobre la aplicación de un protocolo de diagnóstico online en personas mayores y los indicadores de depresión que podrían estar dado por la situación actual de pandemia.

The COVID-19 pandemic has had a great impact in the world, more so in the lives of elderly people. The objective of this study was to explore an online screening protocol to detect early Mild Cognitive Impairment. The method was both quantitative and qualitative, the sample included 22 elderly people from the Coronel y Lota, Biobio region. The protocol was integrated with a sociodemographic questionnaire, the Clock Drawing Test (Cacho Version), MOCA (validated in Chile version), Yesavage Depression Scale (Reduced version) and the Word Accentuation Test. The evaluation involved applying the protocol online in a tele neuropsychological assessment. The results showed that most of the elder people evaluated did not present cognitive impairment but did have depression. The application of an online diagnostic protocol in older people and the indicators of depression that could be given by the current pandemic situation are discussed.

Decision tree-based classification as a support to diagnosis in the Alzheimer's disease continuum using cerebrospinal fluid biomarkers: insights from automated analysis

Objective: Cerebrospinal fluid (CSF) biomarkers add accuracy to the diagnostic workup of cognitive impairment by illustrating Alzheimer's disease (AD) pathology. However, there are no universally accepted cutoff values for the interpretation of AD biomarkers. The aim of this study is to determine the viability of a decision-tree method to analyse CSF biomarkers of AD as a support for clinical diagnosis. Methods: A decision-tree method (automated classification analysis) was applied to concentrations of AD biomarkers in CSF as a support for clinical diagnosis in older adults with or without cognitive impairment in a Brazilian cohort. In brief, 272 older adults (68 with AD, 122 with mild cognitive impairment [MCI], and 82 healthy controls) were assessed for CSF concentrations of Aβ1-42, total-tau, and phosphorylated-tau using multiplexed Luminex assays; biomarker values were used to generate decision-tree algorithms (classification and regression tree) in the R statistical software environment. Results: The best decision tree model had an accuracy of 74.65% to differentiate the three groups. Cluster analysis supported the combination of CSF biomarkers to differentiate AD and MCI vs. controls, suggesting the best cutoff values for each clinical condition. Conclusion: Automated analyses of AD biomarkers provide valuable information to support the clinical diagnosis of MCI and AD in research settings.

Exploring the Serum Level of RE1 Silencing Transcription Factor in Alzheimer's Disease

Objectives:The aim of this study was to evaluate the serum RE1 silencing transcription factor (REST) level in Alzheimer's disease (AD), mild cognitive impairment (MCI), and elderly controls by using surface plasmon resonance (SPR) technology. Materials and Methods?In this case–control study of 133 subjects, 49 patients with AD, 49 patients with MCI, and 35 elderly controls were recruited. The REST protein concentrations were evaluated by SPR. The resonance unit for each sample was recorded and the concentration of serum REST of study group was derived from the standard curve. All the experiments were done in triplicates. Statistical analysis was done and p-value of < 0.05 was considered as statistically significant. Results?A significant difference was observed in the Montreal Cognitive Assessment score, Hindi Mental State Examination scale (HMSE) score education, disease duration, and gender among the groups. A significant (p>0.0001) difference in the duration of disease between AD and MCI was observed. It was observed that the mean concentration of serum REST was not significantly (p?=?0.266) different among the groups. Conclusion?This study first time evaluated the serum levels of REST in AD, MCI and age-matched elderly controls. The rest levels were similar in all groups; however, it can provide a new direction to future blood-based biomarker studies of REST.

Effect of cranial electrotherapy stimulation on mild cognitive impairment for older adults SHI Haonan,XIE Ying(),GUI Peijun,ZHANG Bo,CHEN Chen / 中国康复理论与实践

@#Objective To explore the effect of cranial electrotherapy stimulation (CES) on cognitive function for old patients with mild cognitive impairment.Methods A total of 40 old inpatients with mild cognitive impairment in 2018 and 2019 were randomly divided into control group (n = 20) and treatment group (n = 20). Both groups accepted routine medication (without cognitive drugs), and the treatment group accepted CES in addition, for eight weeks. They were assessed with modified Barthel Index (MBI) and Montreal Cognitive Assessment (MoCA) by two researchers single-blind before treatment, and four and eight weeks after treatment. The control group accepted free CES after trial.Results For MoCA score, the main effect was significant in time (F = 5.603, P = 0.007), not significant in group (F = 2.160, P = 0.150), and the effect of interaction was significant (F = 9.160, P < 0.001), which was more in the treatment group than in the control group. For MBI score, the main effects were not significant both in time (F = 0.322, P = 0.726) and in group (F = 0.009, P = 0.925), nor the effect of interaction (F = 0.322, P = 0.726). No adverse reactions occurred during CES intervention.Conclusion CES may be effective on mild cognitive impairment in old patients.

Preliminary study on Beijing norm of Memory and Executive Screening scale / 中华神经科杂志

Objective:To develop a Beijing norm of Memory and Executive Screening (MES) scale to facilitate its further promotion and application in the future.Methods:Study subjects were selected based on the inclusion and exclusion criteria, including patients who visited the memory clinic of Xuanwu Hospital of Capital Medical University from March 20, 2017 to January 6, 2021, and normal people recruited simultaneously from community, and trained and qualified investigators conducted questionnaire surveys through face-to-face interviews. Then strict quality control, data collection and statistical analysis were performed.Results:A total of 607 participants were included, including 239 normal people, 293 individuals with subjective cognitive decline (SCD), and 75 individuals with mild cognitive impairment (MCI). There was a negative correlation between the scores of MES and age ( r=-0.19, P<0.001), but a positive correlation between scores of MES and education level ( r=0.29, P<0.001). The optimal cut-off value of this scale in Beijing was 86 points, the area under curve (AUC) of the cut-off value to distinguish MCI was 0.847 (normal people vs MCI) and 0.826 (SCD vs MCI), and after adding demographic variables, AUC showed slight increase (0.847 to 0.850 and 0.826 to 0.847), whereas the differences were not statistically significant ( Znormal peoplevsMCI=0.49, ZSCDvsMCI=1.21, P>0.05). And there was no statistically significant difference between MES and Montreal Cognitive Assessment scales in diagnostic power for normal people and people with MCI ( Zscale alone=1.03, Zafter adding demographic variables=1.13, P>0.05). Conclusions:The MES scale has a better distinguishing power for MCI, and its optimal cut-off value in Beijing is 86 points, which is different from previous studies. In the future, the sample size needs to be further expanded to verify this norm.