Evidence map›Paper›PMID 25075865›Full record

ArticlePloS one2014

Phenotype refinement strengthens the association of AHR and CYP1A1 genotype with caffeine consumption.

George McMahon, Amy E Taylor, George Davey Smith, Marcus R Munafò

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 5 pooled it
3.1field-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

27 citing papers in PubMed, 5 syntheses or guidelines pooled it, 48 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

4 authors at 3 institutions in 1 country.

George McMahonMedical Research Council Integrative Epidemiology Unit at the University of Bristol, Bristol, United Kingdom; School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom.
Amy E TaylorMedical Research Council Integrative Epidemiology Unit at the University of Bristol, Bristol, United Kingdom; United Kingdom Centre for Tobacco and Alcohol Studies, University of Bristol, Bristol, United Kingdom; School of Experimental Psychology, University of Bristol, Bristol, United Kingdom.
George Davey SmithMedical Research Council Integrative Epidemiology Unit at the University of Bristol, Bristol, United Kingdom; School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom.
Marcus R MunafòMedical Research Council Integrative Epidemiology Unit at the University of Bristol, Bristol, United Kingdom; United Kingdom Centre for Tobacco and Alcohol Studies, University of Bristol, Bristol, United Kingdom; School of Experimental Psychology, University of Bristol, Bristol, United Kingdom.
Medical Research Council · GBUK Centre for Tobacco & Alcohol Studies · GBUniversity of Bristol · GB

Funding

LCenter for Clinical and Translational Science and TrainingUL1TR001425 · NCATS · UNIVERSITY OF CINCINNATI · PI MEINZEN-DERR, JAREEN, STRAWN, JEFFREY ROBERT · 2015 to 2024
$37.5M
British Heart FoundationCancer Research UKMedical Research Council G0800612Medical Research Council G0802736Medical Research Council G9815508Medical Research Council MC_PC_15018Medical Research Council MC_UU_12013/1Medical Research Council MC_UU_12013/1-9Medical Research Council MC_UU_12013/6Medical Research Council MR/J01351X/1Medical Research Council MR/K023233/1NCATS NIH HHS UL1 TR001425Wellcome Trust 092731Wellcome Trust 102215
6 · The paper itself

Abstract

Two genetic loci, one in the cytochrome P450 1A1 (CYP1A1) and 1A2 (CYP1A2) gene region (rs2472297) and one near the aryl-hydrocarbon receptor (AHR) gene (rs6968865), have been associated with habitual caffeine consumption. We sought to establish whether a more refined and comprehensive assessment of caffeine consumption would provide stronger evidence of association, and whether a combined allelic score comprising these two variants would further strengthen the association. We used data from between 4,460 and 7,520 women in the Avon Longitudinal Study of Parents and Children, a longitudinal birth cohort based in the United Kingdom. Self-report data on coffee, tea and cola consumption (including consumption of decaffeinated drinks) were available at multiple time points. Both genotypes were individually associated with total caffeine consumption, and with coffee and tea consumption. There was no association with cola consumption, possibly due to low levels of consumption in this sample. There was also no association with measures of decaffeinated drink consumption, indicating that the observed association is most likely mediated via caffeine. The association was strengthened when a combined allelic score was used, accounting for up to 1.28% of phenotypic variance. This was not associated with potential confounders of observational association. A combined allelic score accounts for sufficient phenotypic variance in caffeine consumption that this may be useful in Mendelian randomization studies. Future studies may therefore be able to use this combined allelic score to explore causal effects of habitual caffeine consumption on health outcomes.

Indexed as

AdultBasic Helix-Loop-Helix ProteinsCaffeineCytochrome P-450 CYP1A1Drinking BehaviorFemaleGenetic VariationGenotypeHumansLife StyleLongitudinal StudiesPhenotypePolymorphism, Single NucleotidePregnancyReceptors, Aryl HydrocarbonSelf ReportAHR protein, humanBasic Helix-Loop-Helix ProteinsCaffeineCytochrome P-450 CYP1A1Receptors, Aryl Hydrocarbon

Identifiers

PMID25075865
PMCPMC4116211
OpenAlexW2048610563

What OpenQuestion holds

Textmetadata
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.