Evidence map›Paper›PMID 29456763›Full record

ArticleClinical epigenetics2018

Causal effect of smoking on DNA methylation in peripheral blood: a twin and family study.

Shuai Li, Ee Ming Wong, Minh Bui, Tuong L Nguyen, Ji-Hoon Eric Joo, Jennifer Stone, Gillian S Dite, Graham G Giles, Richard Saffery, Melissa C Southey and 1 more

Abstract readTwin Study
In one paragraph

Article in Clinical epigenetics, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 54 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
54citing 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

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

  1. Pooled it
  2. DNA methylation GrimAge acceleration in US military veterans with PTSD.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2023
    Trial
  3. A longitudinal study of CLDN5 DNA methylation and PTSD.Journal of behavioral medicine · 2026
    Article
  4. Article
  5. Article
  6. Article
  7. Trauma Exposure, PTSD, and Methylation of the Blood Brain Barrier Claudin-5 Gene.medRxiv : the preprint server for health sciences · 2025
    Article
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  10. Review
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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

11 authors.

Shuai Li1Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Parkville, Victoria Australia.
Ee Ming Wong2Genetic Epidemiology Laboratory, Department of Pathology, University of Melbourne, Parkville, Victoria Australia.
Minh Bui1Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Parkville, Victoria Australia.
Tuong L Nguyen1Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Parkville, Victoria Australia.
Ji-Hoon Eric Joo2Genetic Epidemiology Laboratory, Department of Pathology, University of Melbourne, Parkville, Victoria Australia.
Jennifer Stone4Centre for Genetic Origins of Health and Disease, Curtin University and the University of Western Australia, Perth, Western Australia Australia.
Gillian S Dite1Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Parkville, Victoria Australia.
Graham G Giles1Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Parkville, Victoria Australia.
Richard Saffery6Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, Victoria Australia.
Melissa C Southey2Genetic Epidemiology Laboratory, Department of Pathology, University of Melbourne, Parkville, Victoria Australia.
John L Hopper1Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Parkville, Victoria Australia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Smoking has been reported to be associated with peripheral blood DNA methylation, but the causal aspects of the association have rarely been investigated. We aimed to investigate the association and underlying causation between smoking and blood methylation. Methods: The methylation profile of DNA from the peripheral blood, collected as dried blood spots stored on Guthrie cards, was measured for 479 Australian women including 66 monozygotic twin pairs, 66 dizygotic twin pairs, and 215 sisters of twins from 130 twin families using the Infinium HumanMethylation450K BeadChip array. Linear regression was used to estimate associations between methylation at ~ 410,000 cytosine-guanine dinucleotides (CpGs) and smoking status. A regression-based methodology for twins, Inference about Causation through Examination of Familial Confounding (ICE FALCON), was used to assess putative causation. Results: At a 5% false discovery rate, 39 CpGs located at 27 loci, including previously reported Conclusions: For middle-aged women, peripheral blood DNA methylation at several genomic locations is associated with smoking. Our study suggests that smoking has a causal effect on peripheral blood DNA methylation, but not vice versa.

Indexed as

DNA MethylationAustraliaCpG IslandsDNAEpigenesis, GeneticFemaleGenetic Association StudiesGenome-Wide Association StudyHumansLinear ModelsMiddle AgedPedigreeSmokingTwins, DizygoticTwins, MonozygoticDNACausal inferenceDNA methylationEpigenome-wide association studyFamily studySmoking

Identifiers

PMID29456763
PMCPMC5810186

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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.