Evidence map›Paper›PMID 21215387›Full record

ArticleBiological psychiatry2011

IQ, educational attainment, memory and plasma lipids: associations with apolipoprotein E genotype in 5995 children.

Amy E Taylor, Philip A I Guthrie, George Davey Smith, Jean Golding, Naveed Sattar, Aroon D Hingorani, John E Deanfield, Ian N M Day

Open access · hybridAbstract read
In one paragraph

Article in Biological psychiatry, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
2.6field-weighted citation impact, top 10% 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

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 44 citations in OpenAlex.

  1. Pooled it
  2. The physiological effects of APOE genotype in healthy young/middle-aged individuals.Biological reviews of the Cambridge Philosophical Society · 2026
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 1 country.

Amy E TaylorMRC Centre for Causal Analyses in Translational Epidemiology, School of Social and Community Medicine, University of Bristol, Bristol, UK. amy.taylor@bristol.ac.uk
Philip A I Guthrie
George Davey Smith
Jean Golding
Naveed Sattar
Aroon D Hingorani
John E Deanfield
Ian N M Day
University of Bristol · GBUniversity College London · GBUniversity of Glasgow · GB

Funding

British Heart FoundationMedical Research Council 74882Medical Research Council G0600705Medical Research Council G0601625Medical Research Council G9815508Wellcome Trust 076467Wellcome Trust 092731Wellcome Trust WT083431MA
6 · The paper itself

Abstract

backgroundApolipoprotein E (APOE) genotype (ε2/ε3/ε4: rs429358 ε4 allele; rs7412 ε2 allele) is strongly associated with both lipid levels and Alzheimer's disease. Although there is also evidence of milder cognitive impairment in later life in carriers of the APOE ε4 allele, there have been few studies investigating the impact of APOE genotype on cognitive function in children.

methodsWe determined APOE genotype in 5995 children from the Avon Longitudinal Study of Parents and Children and investigated associations between APOE genotype and plasma lipids (at age 9), IQ (at age 8), memory (at ages 8 and 10), and performance in school attainment tests (at ages 7, 11, and 14).

resultsObserved genotype group counts were consistent with Hardy-Weinberg equilibrium (χ(2)p value = .84). There were strong relationships between APOE genotype and low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, and triglycerides, which follow the same patterns as in adults. There was no strong evidence to suggest that APOE genotype was associated with IQ (all p values ≥ .46), memory function (p ≥ .35), or school attainment test results (p ≥ .28).

conclusionAlthough APOE genotype does have strong associations with lipid levels in childhood, there does not seem to be meaningful effects on cognitive performance, suggesting that any detrimental effects of the ε4 allele on cognitive function are not important until later life.

Indexed as

Educational StatusApolipoproteins EChildCholesterolCognitionEducationFemaleGene FrequencyHumansIntelligenceLipidsLipoproteinsMaleMemoryNeuropsychological TestsPregnancyApolipoproteins ECholesterolLipidslipoprotein cholesterolLipoproteins

Identifiers

PMID21215387
PMCPMC3130925
OpenAlexW2002639219

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

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.