scholarly journals Intraindividual variability in psychometrically defined mild cognitive impairment status in older African Americans.

2012 ◽  
Vol 27 (4) ◽  
pp. 989-997 ◽  
Author(s):  
Alyssa A. Gamaldo ◽  
Jason C. Allaire ◽  
Keith E. Whitfield
2010 ◽  
Vol 24 (4) ◽  
pp. 365-371 ◽  
Author(s):  
Kristen L. Triebel ◽  
Ozioma C. Okonkwo ◽  
Roy Martin ◽  
Henry Randall Griffith ◽  
Martha Crowther ◽  
...  

2010 ◽  
Vol 25 (7) ◽  
pp. 748-755 ◽  
Author(s):  
Alyssa A. Gamaldo ◽  
Jason C. Allaire ◽  
Regina C. Sims ◽  
Keith E. Whitfield

2021 ◽  
pp. 1-6
Author(s):  
Dianxu Ren ◽  
Oscar L. Lopez ◽  
Jennifer H. Lingler ◽  
Yvette Conley

We examined the association between APOE ɛ2/ɛ4 with incident Alzheimer’s disease (AD) and mild cognitive impairment (MCI) among African Americans using the national dataset from the National Alzheimer’s Coordinating Center (NACC) from 2005 to September 2019. Compared to ɛ3/ɛ3 carriers, ɛ2/ɛ4 carriers exhibited a similar risk of incident AD (adjusted hazard ratio [aHR] = 0.85, 95% CI [0.39, 1.84]) among the AD cohort and similar risk of incident MCI (aHR = 0.88, 95% CI [0.51, 1.50]) among the MCI cohort. Our findings suggest that, unlike the increased risk of AD and MCI in non-Latino whites, APOE ɛ2/ɛ4 genotype is not associated with the incidence of AD and MCI among African Americans.


2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Irene B. Meier ◽  
Max Buegler ◽  
Robbert Harms ◽  
Azizi Seixas ◽  
Arzu Çöltekin ◽  
...  

AbstractConventional neuropsychological assessments for Alzheimer’s disease are burdensome and inaccurate at detecting mild cognitive impairment and predicting Alzheimer’s disease risk. Altoida’s Digital Neuro Signature (DNS), a longitudinal cognitive test consisting of two active digital biomarker metrics, alleviates these limitations. By comparison to conventional neuropsychological assessments, DNS results in faster evaluations (10 min vs 45–120 min), and generates higher test-retest in intraindividual assessment, as well as higher accuracy at detecting abnormal cognition. This study comparatively evaluates the performance of Altoida’s DNS and conventional neuropsychological assessments in intraindividual assessments of cognition and function by means of two semi-naturalistic observational experiments with 525 participants in laboratory and clinical settings. The results show that DNS is consistently more sensitive than conventional neuropsychological assessments at capturing longitudinal individual-level change, both with respect to intraindividual variability and dispersion (intraindividual variability across multiple tests), across three participant groups: healthy controls, mild cognitive impairment, and Alzheimer’s disease. Dispersion differences between DNS and conventional neuropsychological assessments were more pronounced with more advanced disease stages, and DNS-intraindividual variability was able to predict conversion from mild cognitive impairment to Alzheimer’s disease. These findings are instrumental for patient monitoring and management, remote clinical trial assessment, and timely interventions, and will hopefully contribute to a better understanding of Alzheimer’s disease.


2019 ◽  
Vol 3 (Supplement_1) ◽  
pp. S112-S113
Author(s):  
Kathy D Wright ◽  
Klatt Maryanna ◽  
Ingrid Adams ◽  
Cady Block ◽  
Todd Monroe ◽  
...  

Abstract The resting state network (RSN) is a target of interest in neurodegenerative research, with evidence linking functional connectivity of its constituent nodes with mild cognitive impairment and dementia. Given the emerging linkage between Alzheimer’s disease and related dementia disorders (ADRD) and hypertension (HTN), non-pharmacological interventions that promote RSN connectivity and blood pressure are needed. The purpose of this pilot study protocol is to deliver a novel intervention, combining mindfulness and the Dietary Approaches to Stop Hypertension (DASH), to improve RSN connectivity and blood pressure in African American (AA) older adults with MCI and HTN. Thirty-six AAs aged 65 and older will be randomized to mindfulness plus DASH, attention control (non-health related education), or a control group. The Mindfulness in Motion (MIM) plus DASH intervention is delivered in 8-weekly group sessions of 6-10 participants. MIM includes mindful movements from chair/standing, breathing exercises and guided meditation. The DASH intervention uses a critical thinking approach that involves problem solving, goal setting, reflection, and developing self-efficacy. Both components are culturally tailored for older African Americans. Cognitive examination, diet and mindfulness practice surveys, blood pressure, and functional magnetic resonance imaging (RSN) data are collected at baseline and 3 months. Forty-eight AAs were screened and 17 were enrolled (women= 13; men= 4) to date. Of the 17 enrolled, 7 were eligible for neuroimaging. Findings from this pilot study may provide the preliminary evidence that MIM plus DASH may improve RSN connectivity and blood pressure in this population at risk for ADRD.


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