Evidence map›Paper›PMID 28234025›Full record

ArticleEpigenomics2017

Misclassified exposure in epigenetic mediation analyses. Does DNA methylation mediate effects of smoking on birthweight?

Linda Valeri, Sarah L Reese, Shanshan Zhao, Christian M Page, Wenche Nystad, Brent A Coull, Stephanie J London

Open access · bronzeAbstract read
In one paragraph

Article in Epigenomics, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 3 pooled it
11.0field-weighted citation impact, top 2% 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

35 citing papers in PubMed, 3 syntheses or guidelines pooled it, 47 citations in OpenAlex.

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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

7 authors at 3 institutions in 1 country.

Linda ValeriDepartment of Psychiatry, Harvard Medical School, Boston, MA 02115, USA.
Sarah L ReeseNational Institute of Environmental Health Sciences, National Institutes of Health, Department of Health & Human Services, Research Triangle Park, NC, USA.
Shanshan ZhaoNational Institute of Environmental Health Sciences, National Institutes of Health, Department of Health & Human Services, Research Triangle Park, NC, USA.
Christian M PageNational Institute of Public Health, Oslo, Norway.
Wenche NystadNational Institute of Public Health, Oslo, Norway.
Brent A CoullDepartment of Biostatistics, Harvard T.H. Chan School of Public Health.
Stephanie J LondonNational Institute of Environmental Health Sciences, National Institutes of Health, Department of Health & Human Services, Research Triangle Park, NC, USA.
Harvard University · USNational Institute of Environmental Health Sciences · USNational Institutes of Health · US

Funding

Gene-Environment Interactions in an Autism Birth CohortU01NS047537 · NINDS · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI LIPKIN, W. IAN · 2003 to 2013
$27.0M
Genetic And Environmental Factors In Childhood Respiratory HealthZIAES049019 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI LONDON, STEPHANIE · 2009 to 2025
$6.8M
Statistical Methods for the Spatio-Temporal Assessment of Social Disparities in CancerP01CA134294 · NCI · HARVARD SCHOOL OF PUBLIC HEALTH · PI HANEUSE, SEBASTIEN, HERNAN, MIGUEL · 2008 to 2017
$6.8M
Application of Statistical Methods in Epidemiology StudiesZIAES103308 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI ZHAO, SHANSHAN · 2015 to 2025
$2.2M
GENETIC AND ENVIRONMENTAL FACTORS IN CHILDHOOD RESPIRATORY HEALTHZ01ES049019 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI LONDON, STEPHANIE JOAN · 1996 to 2008
$537k
Intramural NIH HHS Z01 ES049019NCI NIH HHS P01 CA134294NIEHS NIH HHS N01 ES075558NINDS NIH HHS U01 NS047537
6 · The paper itself

Abstract

aimsAssessing whether epigenetic alterations mediate associations between environmental exposures and health outcomes is increasingly popular. We investigate the impact of exposure misclassification in such investigations. MATERIALS &

methodsWe quantify bias and false-positive rates due to exposure misclassification in mediation analysis and assess the performance of the simulation extrapolation method (SIMEX). We evaluate whether DNA-methylation mediates smoking-birth weight relationship in the Norwegian Mother and Child Study birth cohort.

resultsIgnoring exposure misclassification increases type I error in mediation analysis. The direct effect is underestimated and, when the mediator is a biomarker of the exposure, as is true for smoking, the indirect effect is overestimated.

conclusionMisclassification correction plus cautious interpretation are recommended for mediation analyses in the presence of exposure misclassification.

Indexed as

DNA MethylationAdultBiasBirth WeightEpigenomicsFalse Positive ReactionsFemaleFetal Growth RetardationGenome-Wide Association StudyHumansInfant, NewbornSmokingDNA methylationmediation analysismisclassification

Identifiers

PMID28234025
PMCPMC5331915
OpenAlexW2590774592

What OpenQuestion holds

Textmetadata
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.