Evidence map›Paper›PMID 28554539›Full record

SynthesisThe American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry2017

Challenging Assumptions About African American Participation in Alzheimer Disease Trials.

Richard E Kennedy, Gary R Cutter, Guoqiao Wang, Lon S Schneider

Open access · greenAbstract readMeta-Analysis
In one paragraph

Synthesis in The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 1 pooled it
1.7field-weighted citation impact, top 15% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

28 citing papers in PubMed, 1 synthesis or guideline pooled it, 31 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Understanding Inclusion and Participation of People From Black African Diaspora Communities in Health and Care Research: A Realist Review.Health expectations : an international journal of public participation in health care and health policy · 2025
    Review
  4. Review
  5. Article
  6. Review
  7. Article
  8. Article
  9. Leveraging African American family connectors for Alzheimer's disease genomic studies.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2023
    Article
  10. Intersectionality in Alzheimer's Disease: The Role of Female Sex and Black American Race in the Development and Prevalence of Alzheimer's Disease.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2023
    Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Black and White individuals differ in dementia prevalence, risk factors, and symptomatic presentation.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2022
    Article
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 3 institutions in 1 country.

Richard E KennedyDepartment of Medicine, University of Alabama at Birmingham, Birmingham, AL. Electronic address: rekenned@uab.edu.
Gary R CutterDepartment of Biostatistics, University of Alabama at Birmingham, Birmingham, AL.
Guoqiao WangDepartment of Biostatistics, Washington University School of Medicine, St. Louis, MO.
Lon S SchneiderDepartments of Psychiatry, Neurology, and Gerontology, University of Southern California Keck School of Medicine, Los Angeles, CA.
University of Alabama at Birmingham · USUniversity of Southern California · USWashington University in St. Louis · US

Funding

Project 1U19AG024904 · NIA · NORTHERN CALIFORNIA INSTITUTE/RES/EDU · PI MONICA G. RIVERA-MINDT · 2016 to 2026
$226.7M
Alzheimer's Disease Neuroimaging Initiative - SupplementU01AG024904 · NIA · NORTHERN CALIFORNIA INSTITUTE RES &EDUC · PI WEINER, MICHAEL W · 2004 to 2015
$121.0M
TRIAL OF VALPROATE TO ATTENUATE THE PROGRESSION OF ADU01AG010483 · NIA · UNIVERSITY OF ROCHESTER · PI AISEN, PAUL S. · 1991 to 2012
$116.2M
VASCULAR RISK AND COGNITIVE STATUS IN A LATINO POPULATIONP50AG005142 · NIA · UNIVERSITY OF SOUTHERN CALIFORNIA · PI BRASKIE, MEREDITH NICOLE · 1985 to 2019
$41.0M
Research Education CoreP30AG031054 · NIA · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI CROWTHER, MARTHA R · 2007 to 2025
$11.6M
Synthesis of Longer-Term Alzheimer Disease Studies in Order to Model and ImproveR01AG037561 · NIA · UNIVERSITY OF SOUTHERN CALIFORNIA · PI SCHNEIDER, LON S · 2011 to 2013
$1.6M
NIA NIH HHS P30 AG031054NIA NIH HHS P50 AG005142NIA NIH HHS R01 AG037561NIA NIH HHS U01 AG010483NIA NIH HHS U01 AG024904NIA NIH HHS U19 AG024904
6 · The paper itself

Abstract

objectiveThe authors investigated potential effects of increased African American participation in Alzheimer disease (AD) and mild cognitive impairment (MCI) clinical trials by examining differences in comorbid conditions and treatment outcome affecting trial design.

methodsUsing a meta-database of 18 studies from the Alzheimer's Disease Cooperative Study and the Alzheimer's Disease Neuroimaging Initiative, a cohort of 5,164 subjects were included for whom there were baseline demographic data and information on comorbid disorders, grouped by organ system. Meta-analysis was used to compare prevalence of comorbidities, dropouts, and rates of change on the cognitive subscale of the Alzheimer's Disease Assessment Scale by race. Clinical trial scenarios similar to recent therapeutic trials were simulated to determine effects of increased African American participation on statistical power.

resultsApproximately 7% of AD, 4% of MCI, and 11% of normal participants were African American. African American subjects had higher prevalence of cardiovascular disorders (odds ratio: 2.10; 95% confidence interval [CI]: 1.71-2.57) and higher rate of dropouts (odds ratio: 1.60; 95% CI: 1.15-2.21) compared with whites but lower rates of other disorders. There were no significant differences in rate of progression (-0.862 points/year; 95% CI: -1.89 to 0.162) by race and little effect on power in simulated trials with sample sizes similar to current AD trial designs.

conclusionIncreasing African American participation in AD clinical trials will require adaptation of trial protocols to address comorbidities and dropouts. However, increased diversity is unlikely to negatively affect trial outcomes and should be encouraged to promote generalizability of trial results.

Indexed as

Patient SelectionAgedAged, 80 and overAlzheimer DiseaseBlack or African AmericanCardiovascular DiseasesClinical Trials as TopicCognitive DysfunctionComorbidityFemaleHumansMalePatient DropoutsUnited StatesWhite PeopleAlzheimer diseaseclinical trial designdiversitymild cognitive impairmentracial differences

Identifiers

PMID28554539
PMCPMC5842064
OpenAlexW2608939653

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.