Evidence map›Paper›PMID 19385963›Full record

ArticleBJOG : an international journal of obstetrics and gynaecology2009

Occupational predictors of pregnancy outcomes in Irish working women in the Lifeways cohort.

I Niedhammer, D O'Mahony, S Daly, J J Morrison, C C Kelleher, Lifeways Cross-Generation Cohort Study Steering Group

Abstract readMulticenter Study
In one paragraph

Article in BJOG : an international journal of obstetrics and gynaecology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 7 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 7 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

30 citing papers in PubMed, 7 syntheses or guidelines pooled it.

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  4. Physically demanding work and preterm delivery: a systematic review and meta-analysis.International archives of occupational and environmental health · 2014
    Pooled it
  5. Shift work, long working hours and preterm birth: a systematic review and meta-analysis.International archives of occupational and environmental health · 2014
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  11. Greater Risk of Pregnancy Complications for Female Surgeons: A Cross-Sectional Electronic Survey.International journal of environmental research and public health · 2022
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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

6 authors.

I NiedhammerUCD School of Public Health & Population Science, University College Dublin, Dublin, Ireland. isabelle.niedhammer@inserm.fr
D O'Mahony
S Daly
J J Morrison
C C Kelleher
Lifeways Cross-Generation Cohort Study Steering Group

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThe objective of this study was to explore the association between occupational factors and pregnancy outcomes in a prospective cohort of Irish pregnant women.

designThis study has a prospective design. POPULATION: The Lifeways cohort included 1124 pregnant women, 676 of whom delivered a single baby and were working at their first prenatal care visit when they filled in a self-administered questionnaire.

methodsOccupational factors were measured using this questionnaire and included eight factors describing job and working conditions. Data including pregnancy outcomes were also obtained from clinical hospital records. Logistic regression analysis was used to adjust for well-known risk factors.

main outcome measuresBirthweight (< or =3000 g and < or =2500 g), preterm delivery (<37 gestation weeks) and small-for-gestational-age.

resultsSignificant associations were found between physical work demands and low birthweight (< or =2500 g) and working with between a temporary contract and preterm delivery. Trends were also observed between working 40 hours or more a week and shift work, and birthweight of 3000 g or less. The study of a cumulative index showed that being exposed to at least two of these occupational factors significantly predicted birthweight of < or =3000 g (OR = 2.44, 95% CI: 1.17-5.08) and of < or =2500 g (OR = 4.65, 95% CI: 1.08-20.07) and preterm delivery (OR = 5.18, 95% CI: 1.00-27.01).

conclusionsOur findings suggest that occupational factors may predict birthweight through their predictive effects on preterm delivery. This is one of the few prospective studies on pregnancy outcomes that include working conditions. As they may be modifiable, occupational factors deserve more attention in relation to birth outcomes.

Indexed as

AdolescentAdultBirth WeightEmploymentFemaleHumansInfant, Low Birth WeightInfant, NewbornInfant, Small for Gestational AgeIrelandParityPregnancyPregnancy OutcomePremature BirthProspective StudiesWomen, Working

Identifiers

PMID19385963
PMCPMC2872657

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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.