Evidence map›Paper›PMID 34692978›Full record

ArticleAlzheimer's & dementia (Amsterdam, Netherlands)2021

Objective subtle cognitive decline and plasma phosphorylated tau181: Early markers of Alzheimer's disease-related declines.

Kelsey R Thomas, Katherine J Bangen, Emily C Edmonds, Alexandra J Weigand, Kayla S Walker, Mark W Bondi, Douglas R Galasko, Alzheimer's Disease Neuroimaging Initiative

Abstract read
In one paragraph

Article in Alzheimer's & dementia (Amsterdam, Netherlands), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

23 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Association Between Cognitively Stimulating Activities and Cognitive Function in Older Adults Living in Residential Care Homes.Psychogeriatrics : the official journal of the Japanese Psychogeriatric Society · 2026
    Article
  3. Article
  4. AD-related plasma biomarkers in centenarians: links to cognition and neuropathology.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
  5. Observational
  6. Article
  7. Article
  8. Article
  9. Associations of Post-Traumatic Stress Disorder and Objective Subtle Cognitive Difficulties in Cognitively Unimpaired Older Veterans.Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists · 2024
    Article
  10. Article
  11. Plasma biomarkers for Alzheimer's and related dementias: A review and outlook for clinical neuropsychology.Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists · 2024
    Review
  12. Review
  13. Article
  14. Article
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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

8 authors.

Kelsey R ThomasResearch Service VA San Diego Healthcare System San Diego California USA.
Katherine J BangenResearch Service VA San Diego Healthcare System San Diego California USA.
Emily C EdmondsResearch Service VA San Diego Healthcare System San Diego California USA.
Alexandra J WeigandSan Diego State University/University of California Joint Doctoral Program in Clinical Psychology San Diego California USA.
Kayla S WalkerResearch Service VA San Diego Healthcare System San Diego California USA.
Mark W BondiDepartment of Psychiatry University of California, San Diego La Jolla California USA.
Douglas R GalaskoDepartment of Neurosciences University of California San Diego School of Medicine La Jolla California USA.
Alzheimer's Disease Neuroimaging Initiative

Funding

UCSD Shiley-Marcos Alzheimer's Disease Research Center P30P30AG062429 · NIA · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI GUERRY Marie PEAVY · 2019 to 2026
$34.9M
New Quantitative Neuroimaging Metrics of Structural and Functional Connectivity of the Locus Coeruleus as a Novel Biomarker of Alzheimer's Disease Pathogenesis and ProgressionR01AG054049 · NIA · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI BONDI, MARK W, FRANK, LAWRENCE R · 2017 to 2021
$4.1M
Intracranial arterial compliance, cerebral blood flow, and dementia risk in older adults with type 2 diabetesR01AG063782 · NIA · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI BANGEN, KATHERINE · 2020 to 2024
$3.7M
Re-visiting Methods for MCI Diagnosis to Improve Biomarker and Trial FindingsR01AG049810 · NIA · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI BONDI, MARK W, EDLAND, STEVEN DYAL · 2016 to 2020
$3.7M
Identifying best methods for the detection of subtle cognitive declineR03AG070435 · NIA · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI THOMAS, KELSEY R · 2021 to 2022
$316k
Impact of Diabetes on Cognitive and Perfusion Inefficiencies in Preclinical ADIK2CX001865 · VA · VA SAN DIEGO HEALTHCARE SYSTEM · PI Kelsey R Thomas · 2020 to 2026
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CSRD VA I01 CX001842CSRD VA IK2 CX001415CSRD VA IK2 CX001865NIA NIH HHS P30 AG062429NIA NIH HHS R01 AG049810NIA NIH HHS R01 AG054049NIA NIH HHS R01 AG063782NIA NIH HHS R03 AG070435
6 · The paper itself

Abstract

introductionObjectively-defined subtle cognitive decline (Obj-SCD) and plasma phosphorylated-tau181 (p-tau181) are promising early Alzheimer's disease (AD) markers. However, associations between Obj-SCD and p-tau181, and their combined prognostic potential, are unknown.

methodsBaseline and 4-year longitudinal p-tau181 changes were compared across cognitively unimpaired (CU;

resultsCU and Obj-SCD has lower baseline p-tau181 than MCI and did not differ from one another. Longitudinally, Obj-SCD had the steepest p-tau181 increase. Obj-SCD/p-tau181-positive participants had the fastest rates of amyloid accumulation, cognitive decline, and functional decline.

conclusionsDespite assumptions that cognitive changes invariably follow biomarker changes, early neuropsychological difficulties may emerge before/concurrently with plasma p-tau181 changes. Combining Obj-SCD and p-tau181, two potentially accessible early markers, was associated with the faster declines in AD-related outcomes.

Indexed as

plasma biomarkerspreclinical ADp‐tau181subtle cognitive decline

Identifiers

PMID34692978
PMCPMC8515224

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

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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.