Evidence map›Paper›PMID 33883019›Full record

ArticleClinical epigenetics2021

Epigenome-wide association study of level and change in cognitive abilities from midlife through late life.

Ida K Karlsson, Malin Ericsson, Yunzhang Wang, Juulia Jylhävä, Sara Hägg, Anna K Dahl Aslan, Chandra A Reynolds, Nancy L Pedersen

Open access · goldAbstract readTwin Study
In one paragraph

Article in Clinical epigenetics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
0.2field-weighted citation impact, top 52% 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

4 citing papers in PubMed, 2 citations in OpenAlex.

  1. Development and validation of MethylCog, a blood DNA methylation proxy for cognition.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Article
  2. [Biological Aging Affects the Rate of Cognitive Decline in Middle-aged and Elderly Populations: A Cohort Study Based on CHARLS].Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition · 2025
    Article
  3. 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 at 4 institutions in 2 countries.

Ida K KarlssonDepartment of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden. ida.karlsson@ki.se.ORCID 0000-0003-3605-7829
Malin EricssonDepartment of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
Yunzhang WangDepartment of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
Juulia JylhäväDepartment of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
Sara HäggDepartment of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
Anna K Dahl AslanDepartment of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
Chandra A ReynoldsDepartment of Psychology, University of California, Riverside, USA.
Nancy L PedersenDepartment of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
Karolinska Institutet · SEUniversity of California, Riverside · USUniversity of Skövde · SEUniversity of Southern California · US

Funding

Forskningsrådet om Hälsa, Arbetsliv och Välfärd 2013-02292Forskningsrådet om Hälsa, Arbetsliv och Välfärd 2018-01201Vetenskapsrådet 2013-08689Vetenskapsrådet 2015-03255Vetenskapsrådet 2015-06796Vetenskapsrådet 2019-01272
6 · The paper itself

Abstract

backgroundEpigenetic mechanisms are important in aging and may be involved in late-life changes in cognitive abilities. We conducted an epigenome-wide association study of leukocyte DNA methylation in relation to level and change in cognitive abilities, from midlife through late life in 535 Swedish twins.

resultsMethylation levels were measured with the Infinium Human Methylation 450 K or Infinium MethylationEPIC array, and all sites passing quality control on both arrays were selected for analysis (n = 250,816). Empirical Bayes estimates of individual intercept (age 65), linear, and quadratic change were obtained from latent growth curve models of cognitive traits and used as outcomes in linear regression models. Significant sites (p < 2.4 × 10

conclusionsLeukocyte DNA methylation was associated with level, but not change in cognitive abilities. The associations were substantially attenuated in within-pair analyses, indicating they are influenced in part by genetic factors.

Indexed as

CognitionAgedAged, 80 and overAgingDNA MethylationEpigenesis, GeneticEpigenomeFemaleGenome-Wide Association StudyHumansMaleMiddle AgedSwedenTwinsAgingCognitionDNA methylationEWASLongitudinal

Identifiers

PMID33883019
PMCPMC8061224
OpenAlexW3134784666

What OpenQuestion holds

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LicenceCC BY
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.