Evidence map›Paper›PMID 33163609›Full record

ArticleAlzheimer's & dementia (Amsterdam, Netherlands)2020

Instrumental activities of daily living, amyloid, and cognition in cognitively normal older adults screening for the A4 Study.

Gad A Marshall, Sietske A M Sikkes, Rebecca E Amariglio, Jennifer R Gatchel, Dorene M Rentz, Keith A Johnson, Oliver Langford, Chung-Kai Sun, Michael C Donohue, Rema Raman and 4 more

Open access · goldAbstract read
In one paragraph

Article in Alzheimer's & dementia (Amsterdam, Netherlands), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
2.1field-weighted citation impact, top 12% 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, 30 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Cognitive reserve and everyday functioning in cognitively unimpaired older adults: evidence from the CAN-PROTECT study.The journals of gerontology. Series A, Biological sciences and medical sciences · 2026
    Article
  4. The clinical Alzheimer's disease spectrum classified in the A/T/N framework withEuropean journal of nuclear medicine and molecular imaging · 2026
    Observational
  5. Article
  6. Article
  7. Article
  8. Article
  9. Subjective cognitive complaints and future risk of dementia and cognitive impairment, which matters most.Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition · 2025
    Article
  10. Article
  11. Article
  12. Observational
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  16. Review
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  18. Observational
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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

14 authors at 6 institutions in 2 countries.

Gad A MarshallCenter for Alzheimer Research and Treatment Department of Neurology Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA.
Sietske A M SikkesDepartment of Neurology Massachusetts General Hospital Harvard Medical School Boston Massachusetts USA.
Rebecca E AmariglioCenter for Alzheimer Research and Treatment Department of Neurology Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA.
Jennifer R GatchelDepartment of Psychiatry Massachusetts General Hospital Harvard Medical School Boston Massachusetts USA.
Dorene M RentzCenter for Alzheimer Research and Treatment Department of Neurology Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA.
Keith A JohnsonCenter for Alzheimer Research and Treatment Department of Neurology Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA.
Oliver LangfordAlzheimer's Therapeutic Research Institute University of Southern California San Diego California USA.
Chung-Kai SunAlzheimer's Therapeutic Research Institute University of Southern California San Diego California USA.
Michael C DonohueAlzheimer's Therapeutic Research Institute University of Southern California San Diego California USA.
Rema RamanAlzheimer's Therapeutic Research Institute University of Southern California San Diego California USA.
Paul S AisenAlzheimer's Therapeutic Research Institute University of Southern California San Diego California USA.
Reisa A SperlingCenter for Alzheimer Research and Treatment Department of Neurology Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA.
Douglas R GalaskoShiley-Marcos Alzheimer's Disease Research Center University of California San Diego Health-La Jolla San Diego California USA.
Full listing of A4 Study team and site personnel available at A4STUDY.org
Brigham and Women's Hospital · USUniversity of Southern California · USHarvard University · USAutism Research Institute · USMassachusetts General Hospital · USUniversity of California, San Diego · US

Funding

RECRUITMENT COREU19AG010483 · NIA · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI FELDMAN, HOWARD · 2013 to 2020
$80.6M
Research Education ComponentP30AG062421 · NIA · MASSACHUSETTS GENERAL HOSPITAL · PI BRADFORD C DICKERSON · 2019 to 2026
$36.5M
Anti-Amyloid Treatment in Asymptomatic Alzheimer's Disease (A4) Open-Label Extension StudyR01AG063689 · NIA · BRIGHAM AND WOMEN'S HOSPITAL · PI AISEN, PAUL S., SPERLING, REISA A. · 2019 to 2024
$30.8M
Mentoring Imaging Research in Early ADK24AG035007 · NIA · BRIGHAM AND WOMEN'S HOSPITAL · PI SPERLING, REISA A. · 2010 to 2020
$1.4M
Depressive symptoms in the pathogenesis of preclinical Alzheimer's DiseaseK23AG058805 · NIA · MASSACHUSETTS GENERAL HOSPITAL · PI GATCHEL, JENNIFER ROSE · 2018 to 2022
$992k
NIA NIH HHS K23 AG058805NIA NIH HHS K24 AG035007NIA NIH HHS P30 AG062421NIA NIH HHS R01 AG063689NIA NIH HHS U19 AG010483
6 · The paper itself

Abstract

introductionWe examined the associations among instrumental activities of daily living (IADL), cortical amyloid, and cognition in cognitively normal (CN) older adults.

methodsCN participants screening for the A4 Study (n = 4486) underwent florbetapir (amyloid) positron emission tomography. IADL were assessed using the Alzheimer's Disease Cooperative Study Activities of Daily Living Prevention Instrument. Separate logistic regression models were run with cortical amyloid or cognition as independent variable and IADL as dependent variable, adjusting for age and sex.

resultsIADL difficulties were endorsed infrequently (≤16%). Overall IADL and four select IADL item difficulties ("remembering appointments," "finding belongings," "following TV programs," and "remembering current events") reported by both participant and study partner were significantly associated with greater amyloid burden and worse cognition. DISCUSSION: Although IADL deficits were infrequent in this CN cohort, greater participant and study partner report of overall IADL deficits and subtle difficulties in specific IADL items were associated with mildly higher amyloid burden and worse cognition.

Indexed as

Alzheimer's diseaseamyloidcognitioncognitively normalflorbetapirinstrumental activities of daily livingpositron emission tomography

Identifiers

PMID33163609
PMCPMC7596668
OpenAlexW3094881941

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.