Evidence map›Paper›PMID 27239532›Full record

ArticleAlzheimer's & dementia (Amsterdam, Netherlands)2016

Sensitivity of composite scores to amyloid burden in preclinical Alzheimer's disease: Introducing the Z-scores of Attention, Verbal fluency, and Episodic memory for Nondemented older adults composite score.

Yen Ying Lim, Peter J Snyder, Robert H Pietrzak, Albulene Ukiqi, Victor L Villemagne, David Ames, Olivier Salvado, Pierrick Bourgeat, Ralph N Martins, Colin L Masters and 2 more

Open access · goldAbstract read
In one paragraph

Article in Alzheimer's & dementia (Amsterdam, Netherlands), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
64citing papers in PubMed, 2 pooled it
5.1field-weighted citation impact, top 4% 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

64 citing papers in PubMed, 2 syntheses or guidelines pooled it, 95 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Trial
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  6. Trial
  7. Data‑driven cognitive composites predict Aβ‑related decline and progression to MCI: the ADOPIC study.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Article
  8. Article
  9. Associations ofAlzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Article
  10. Article
  11. Review
  12. Article
  13. Development of language composites for enhanced sensitivity to multiple plasma biomarkers.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
  14. Ten years of using the APACS test: a multistudy cross-diagnostic analysis of pragmatic profiles and their relationship with Theory of Mind.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  15. Article
  16. Cognitive modeling of the Mnemonic Similarity Task as a digital biomarker for Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024
    Article
  17. Article
  18. CSF glial biomarkers are associated with cognition in individuals at risk of Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024
    Article
  19. Article
  20. Article

4 more citing papers are in PubMed but not listed here.

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

12 authors at 9 institutions in 2 countries.

Yen Ying LimThe Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Victoria, Australia.
Peter J SnyderDepartment of Neurology, Warren Alpert School of Medicine, Brown University, Providence, RI, USA; Interdisciplinary Neuroscience Program, University of Rhode Island, Kingston, RI, USA.
Robert H PietrzakDepartment of Psychiatry, Yale University School of Medicine, New Haven, CT, USA.
Albulene UkiqiThe Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Victoria, Australia.
Victor L VillemagneThe Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Victoria, Australia; Department of Nuclear Medicine and Centre for PET, Austin Health, Heidelberg, Victoria, Australia; Department of Medicine, Austin Health, The University of Melbourne, Heidelberg, Victoria, Australia.
David AmesAcademic Unit for Psychiatry of Old Age, St. Vincent's Health, The University of Melbourne, Kew, Victoria, Australia; National Ageing Research Institute, Parkville, Victoria, Australia.
Olivier SalvadoCommonwealth Scientific Industrial Research Organization (CSIRO) Preventative Health National Research Flagship, Australian e-Health Research Centre-BioMedIA, Brisbane, Queensland, Australia.
Pierrick BourgeatCommonwealth Scientific Industrial Research Organization (CSIRO) Preventative Health National Research Flagship, Australian e-Health Research Centre-BioMedIA, Brisbane, Queensland, Australia.
Ralph N MartinsCentre of Excellence for Alzheimer's Disease Research and Care, Edith Cowan University, Joondalup, Western Australia, Australia.
Colin L MastersThe Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Victoria, Australia.
Christopher C RoweDepartment of Nuclear Medicine and Centre for PET, Austin Health, Heidelberg, Victoria, Australia; Department of Medicine, Austin Health, The University of Melbourne, Heidelberg, Victoria, Australia.
Paul MaruffThe Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Victoria, Australia; Cogstate Ltd., Melbourne, Victoria, Australia.
Florey Institute of Neuroscience and Mental Health · AUAustin Health · AUAustralian e-Health Research Centre · AUBrown University · USCommonwealth Scientific and Industrial Research Organisation · AUEdith Cowan University · AUSt Vincent's Health · AUUniversity of Melbourne · AUYale University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionCognitive composite scores developed for preclinical Alzheimer's disease (AD) often consist of multiple cognitive domains as they may provide greater sensitivity to detect β-amyloid (Aβ)-related cognitive decline than episodic memory (EM) composite scores alone. However, this has never been empirically tested. We compared the rate of cognitive decline associated with high Aβ (Aβ+) and very high Aβ (Aβ++) in cognitively normal (CN) older adults on three multidomain cognitive composite scores and one single-domain (EM) composite score.

methodsCN older adults (n = 423) underwent Aβ neuroimaging and completed neuropsychological assessments at baseline, and at 18-, 36-, 54-, and 72-month follow-ups. Four cognitive composite scores were computed: the ADCS-PACC (ADCS-Preclinical Alzheimer Cognitive Composite), ADCS-PACC without the inclusion of the mini-mental state examination (MMSE), an EM composite, and the Z-scores of Attention, Verbal fluency, and Episodic memory for Nondemented older adults (ZAVEN) composite.

resultsCompared with Aβ+ CN older adults, Aβ++ CN older adults showed faster rates of decline across all cognitive composites, with the largest decline observed for ZAVEN composite (d = 1.07). Similarly, compared with Aβ- CN older adults, Aβ+ CN older adults also showed faster rates of cognitive decline, but only for the ADCS-PACC no MMSE (d = 0.43), EM (d = 0.53), and ZAVEN (d = 0.50) composites. DISCUSSION: Aβ-related cognitive decline is best detected using validated neuropsychological instruments. Removal of the MMSE from the ADCS-PACC and replacing it with a test of executive function (verbal fluency; i.e., the ZAVEN) rendered this composite more sensitive even in detecting Aβ-related cognitive decline between Aβ+ and Aβ++ CN older adults.

Indexed as

AmyloidCognitive compositeCognitive declineNeuropsychological assessmentPreclinical Alzheimer's disease

Identifiers

PMID27239532
PMCPMC4879646
OpenAlexW2213220213

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.