Evidence map›Paper›PMID 25015471›Full record

ArticleBMJ open2014

Is the growth of the child of a smoking mother influenced by the father's prenatal exposure to tobacco? A hypothesis generating longitudinal study.

Marcus Pembrey, Kate Northstone, Steven Gregory, Laura L Miller, Jean Golding

Open access · goldAbstract read
In one paragraph

Article in BMJ open, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
1.8field-weighted citation impact, top 17% 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

9 citing papers in PubMed, 1 synthesis or guideline pooled it, 17 citations in OpenAlex.

  1. Pooled it
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  6. 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

5 authors at 1 institution in 1 country.

Marcus PembreySchool of Social and Community Medicine, University of Bristol, Bristol, UK Centre for Child and Adolescent Health, University of Bristol, Bristol, UK Institute of Child Health, University College London, London, UK.
Kate NorthstoneSchool of Social and Community Medicine, University of Bristol, Bristol, UK.
Steven GregorySchool of Social and Community Medicine, University of Bristol, Bristol, UK Centre for Child and Adolescent Health, University of Bristol, Bristol, UK.
Laura L MillerSchool of Social and Community Medicine, University of Bristol, Bristol, UK.
Jean GoldingSchool of Social and Community Medicine, University of Bristol, Bristol, UK Centre for Child and Adolescent Health, University of Bristol, Bristol, UK.
University of Bristol · GB

Funding

Medical Research Council G1100226Medical Research Council G9815508Medical Research Council MC_PC_15018Wellcome Trust 102215
6 · The paper itself

Abstract

objectivesTransgenerational effects of different environmental exposures are of major interest, with rodent experiments focusing on epigenetic mechanisms. Previously, we have shown that if the study mother is a non-smoker, there is increased mean birth weight, length and body mass index (BMI) in her sons if she herself had been exposed prenatally to her mother's smoking. The aim of this study was to determine whether the prenatal smoke exposure of either parent influenced the growth of the fetus of a smoking woman, and whether any effects were dependent on the fetal sex.

designPopulation-based prebirth cohort study.

settingAvon Longitudinal Study of Parents and Children.

participantsParticipants were residents of a geographic area with expected date of delivery between April 1991 and December 1992. Among pregnancies of mothers who smoked during pregnancy, data were available concerning maternal and paternal prenatal exposures to their own mother smoking for 3502 and 2354, respectively. PRIMARY AND SECONDARY OUTCOME MEASURES: Birth weight, length, BMI and head circumference.

resultsAfter controlling for confounders, there were no associations with birth weight, length or BMI. There was a strong adjusted association of birth head circumference among boys whose fathers had been exposed prenatally (mean difference -0.35 cm; 95% CI -0.57 to -0.14; p=0.001). There was no such association with girls (interaction p=0.006). Similar associations were found when primiparae and multiparae were analysed separately. In order to determine whether this was reflected in child development, we examined the relationships with IQ; we found that the boys born to exposed fathers had lower IQ scores on average, and that this was particularly due to the verbal component (mean difference in verbal IQ -3.65 points; 95% CI -6.60 to -0.70).

conclusionsHead size differences concerning paternal fetal exposure to smoking were unexpected and, as such, should be regarded as hypothesis generating.

Indexed as

Child DevelopmentFathersGrowthMaternal BehaviorPrenatal Exposure Delayed EffectsAdultCohort StudiesFemaleHumansInfant, NewbornLongitudinal StudiesMalePregnancySmoking

Identifiers

PMID25015471
PMCPMC4120379
OpenAlexW2145739296

What OpenQuestion holds

Textmetadata
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.