American journal of Alzheimer's disease and other dementias最新文献

A growing body of literature has examined the impact of neighborhood characteristics on Alzheimer's disease (AD) dementia, yet the spatial variability and relative importance of the most influential factors remain underexplored. We compiled various widely recognized factors to examine spatial heterogeneity and associations with AD dementia prevalence via geographically weighted random forest (GWRF) approach. The GWRF outperformed conventional models with an out-of-bag R² of 74.8% in predicting AD dementia prevalence and the lowest error (MAE = 0.34, RMSE = 0.45). Key findings showed that mobile homes were the most influential factor in 19.9% of U.S. counties, followed by NDVI (17.4%), physical inactivity (12.9%), households with no vehicle (11.3%), and particulate matter (10.4%), while other primary factors affecting <10% of U.S. counties. Findings highlight the need for county-specific interventions tailored to local risk factors. Policies should prioritize increasing affordable housing stability, expanding green spaces, improving transportation access, promoting physical activity, and reducing air pollution exposure.

Parkinson's disease (PD) is characterized by degeneration of dopaminergic neurons in the substantia nigra (SN), leading to motor impairments, while hippocampal dysfunction contributes to memory deficits. Botulinum neurotoxin (BoNT), a therapeutic modulator of acetylcholine (ACh) release, its cognitive effects remain underexplored. We investigated the effect of BoNT on spatial learning, memory, microglia and hippocampal neurogenesis in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced mouse model of PD. Behavioral tests, including the open field, novel object recognition, and Morris water maze, demonstrated significant improvements in locomotion, learning, and memory with BoNT treatment. BoNT increased the number of doublecortin (DCX)-positive immature neurons and percentage of bromodeoxyuridine (BrdU)/neuronal nuclei (NeuN) double-positive cells, while the reduced number of microglia was evident in the hippocampal dentate gyrus (DG). Additionally, histological analyses revealed BoNT-mediated protection of pyramidal neurons in hippocampal cornu ammonis (CA)-1 and CA3 regions. These findings suggest that BoNT mitigates memory deficits by promoting neurogenesis in experimental PD.

Dementia affects over 55 million people worldwide, with more than 11 million informal caregivers providing care. Caregivers experience physical, psychological, and social stresses, making it crucial to understand their caregiving experience. This study assessed whether the caregivers' perceived choice to provide care and recognition of dementia symptoms influenced their caregiving experiences. A secondary cross-sectional analysis was conducted using data from the National Alliance for Caregiving, including 927 caregivers. Caregiving experience was measured on a 5-point Likert scale. Chi-square tests and ordinal logistic regression were used. Caregivers who perceived they had a choice to provide care were significantly more likely to report positive experiences (ARR = 1.39, P ≤ .001). Recognition of dementia symptoms was not significantly associated with caregiving experience. However, the combination of perceived choice and recognition of dementia symptoms, particularly from one event, was associated with the most positive caregiving experiences. Findings suggest the need for caregiver choice-support and dementia education programs.

Background: The role of parity in predicting dementia risk in women is debated. This study examines how birth rate affects global dementia incidence.

Methods: Country-specific data on birth rate and dementia incidence rate were analyzed using bivariate analysis, partial correlation, and multiple linear regression. Confounding factors such as aging, affluence, genetic predisposition (I_bs), and urbanization were considered.

Results: Pearson's r and nonparametric analyzes showed a significant inverse correlation between birth rate and dementia incidence. This relationship remained significant after controlling for aging, affluence, I_bs, and urbanization. Multiple linear regression identified birth rate as a significant predictor of dementia incidence, and as the strongest predictor. Affluence and urbanization were not significant predictors. The correlation was stronger in developing countries.

Conclusions: Lower birth rate is an independent risk factor for dementia, particularly in developed countries. These findings highlight the importance of considering birth rate in dementia studies.

This study aimed to describe the clinical journey of patients with different stages of Alzheimer disease (AD). This was a cross-sectional survey of US primary care physicians (PCPs)/specialists and patients using the Adelphi Real World AD Disease Specific Programme™ (December 2022 - September 2023). Patients were stratified by disease severity and data are presented as the mean (SD) or frequencies/percentages. In the overall sample (N = 990), mean time from symptom onset to first evaluation was 31.4 (40.6) weeks and mean time from evaluation to diagnosis was 14.2 (29.0) weeks (mild cognitive impairment due to AD, 12.0 [22.7] weeks; mild AD dementia, 15.7 [31.6] weeks; moderate AD dementia, 14.0 [29.9] weeks; severe AD dementia, 5.1 [9.6] weeks). 74.5% of the overall sample was initially evaluated by their PCP and 13.8% by a neurologist. Patients with AD experience many barriers during the diagnostic journey; however, PCPs and neurologists play key roles in early diagnosis.

ObjectiveTo explore the association between lymphocyte-high density lipoprotein ratio (LHR) and cognitive impairment in Chinese older adults.MethodsThis study included participants aged ≥65 years from the 2008 to 2014 waves of the Chinese Longitudinal Healthy Longevity Survey (CLHLS). Cognitive function was assessed using the Mini-Mental State Examination, with a score of less than 24 points considered indicative of cognitive impairment. Multiple logistic regression analysis and restricted cubic spline were applied to investigate the association between LHR and cognitive impairment.ResultsOf 3556 participants, 1625 (45.7%) suffered from cognitive impairment. Multivariate logistic regression analysis indicated that low LHR was associated with cognitive impairment [odds ratio (OR) = 1.34; 95% confidence interval (CI) = 1.11-1.62, P = 0.002].ConclusionsLower LHR was associated with cognitive impairment in Chinese older people. This finding suggests LHR could serve as a novel and accessible biomarker for identifying high-risk aging populations.

This review examines the application of olfactory testing in the early stages of mild cognitive impairment (MCI) associated with Alzheimer's disease (AD), highlighting its potential and challenges in early screening and intervention. Olfactory function is typically divided into three domains: odor identification, odor discrimination, and odor threshold. Among these, odor identification and discrimination are closely linked to higher cognitive processes and exhibit significant impairment in patients with AD and MCI. Moreover, the anatomical and functional characteristics of the olfactory system make it a promising target for the early detection of neurodegenerative disorders. This review also outlines various olfactory assessment tools and evaluates their clinical utility. Future research should aim to enhance the accuracy and cultural adaptability of olfactory tests and integrate them with multimodal diagnostic approaches to advance early detection and intervention strategies for AD.

Music-based interventions show promise for attenuating caregiver distress (CD) in informal dementia caregivers; however, research on comparable dyadic interventions is limited. This study aimed to provide a novel evaluation of whether a dyadic choral intervention could facilitate reductions in CD across 2 choral seasons. 30 caregiving dyads participated in a dementia choir across 2 ∼3.5-month choral seasons separated by a ∼4-month summer break: a naturalistic ABA design. Repeated assessment of the Zarit Burden Interview yielded up to 7 assessments of CD across the 2 choral seasons. Results showed that CD significantly declined across a participant's first choral season, significantly rebounded to new highs upon returning from a summer break, and began to decline again; though, this latter trajectory was not significant. These results highlight the effectiveness of dyadic, music-based interventions for attenuating CD in dementia caregivers, and provides a novel methodological paradigm for use in future research.

BackgroundA validated instrument for assessing adolescent attitudes toward dementia in Chinese-speaking communities is currently lacking. This study aims to translate the Brief-AADS into Chinese and examine the psychometric properties of the Brief AADS-C.MethodsThe methodological study employed a cross-sectional design with 2 phases. Data was collected in Macao and Shenzhen, China.ResultsThe scale demonstrated excellent content validity(S-CVI = 0.99) and good internal consistency (Cronbach's α = 0.814). Test-retest reliability was acceptable (ICC = 0.647). EFA identified a three-factor solution "Perceptions", "Acceptance", and "Engagement" with 11items-accounting for 56.07% of the variance. CFA supported this 3-factor structure with acceptable goodness of fit indices (χ²/df = 3.076, GFI = 0.937, SRMR = 0.0579, RMSEA = 0.077). All factor loadings of the items ranged from 0. 33to 0.82, indicating strong item-factor relationships.ConclusionsThe Brief AADS-C is reliable and valid for assessing adolescent attitudes toward dementia in Chinese-speaking regions.

The Faith Care Family (FCF) Project was a telephone based, volunteer-led intervention for African American Alzheimer's disease and related dementias (AD/ADRD) family caregivers that was piloted in one predominantly African American church. Focus groups with faith leaders and parishioners informed the training and intervention. Eighteen church volunteers participated in the FCF Project training, but 9 of them were paired with family caregivers and completed the FCF Project intervention. Church volunteers indicated overall significant improvements knowledge of AD/ADRD after the training as well as after the intervention. Quantitative results indicated that caregivers increased their knowledge of dementia, reported improved coping skills, and reported increased positive aspects of caregiving. Feeling a connection, normalizing the challenges of caregiving, gaining or reinforcing knowledge, and sharing community resources were themes from qualitative interviews with the family caregivers. Overall, findings indicate that the FCF Project shows promise as an intervention for African American AD/ADRD family caregivers.