Evidence map›Paper›PMID 21538042›Full record

ArticleEuropean journal of epidemiology2011

Chlamydia trachomatis infection during pregnancy associated with preterm delivery: a population-based prospective cohort study.

G Ingrid J G Rours, Liesbeth Duijts, Henriette A Moll, Lidia R Arends, Ronald de Groot, Vincent W Jaddoe, Albert Hofman, Eric A P Steegers, Johan P Mackenbach, Alewijn Ott and 4 more

Open access · hybridAbstract read
In one paragraph

Article in European journal of epidemiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 77 papers, 9 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
77citing papers in PubMed, 9 pooled it
11.2field-weighted citation impact, top 1% 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

77 citing papers in PubMed, 9 syntheses or guidelines pooled it, 194 citations in OpenAlex.

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17 more citing papers are in PubMed but not listed here.

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

14 authors at 3 institutions in 1 country.

G Ingrid J G RoursThe Generation R Study group, Erasmus University Medical Centre, Rotterdam, The Netherlands. rours@mac.com
Liesbeth Duijts
Henriette A Moll
Lidia R Arends
Ronald de Groot
Vincent W Jaddoe
Albert Hofman
Eric A P Steegers
Johan P Mackenbach
Alewijn Ott
Hendrina F M Willemse
Elizabeth A E van der Zwaan
Roel P Verkooijen
Henri A Verbrugh
Erasmus MC · NLErasmus University Rotterdam · NLRotterdam University of Applied Sciences · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Chlamydia trachomatis infection is the most prevalent bacterial sexually transmitted infection and may influence pregnancy outcome. This study was conducted to assess the effect of chlamydial infection during pregnancy on premature delivery and birthweight. Pregnant women attending a participating midwifery practice or antenatal clinic between February 2003 and January 2005 were eligible for the study. From 4,055 women self-administered questionnaires and urine samples, tested by PCR, were analysed for C. trachomatis infection. Pregnancy outcomes were obtained from midwives and hospital registries. Gestational ages and birthweights were analysed for 3,913 newborns. The C. trachomatis prevalence was 3.9%, but varied by age and socio-economic background. Chlamydial infection was, after adjustment for potential confounders, associated with preterm delivery before 32 weeks (OR 4.35 [95% CI 1.3, 15.2]) and 35 weeks gestation (OR 2.66 [95% CI 1.1, 6.5]), but not with low birthweight. Of all deliveries before 32 weeks and 35 weeks gestation 14.9% [95% CI 4.5, 39.5] and 7.4% [95% CI 2.5, 20.1] was attributable to C. trachomatis infection. Chlamydia trachomatis infection contributes significantly to early premature delivery and should be considered a public health problem, especially in young women and others at increased risk of C. trachomatis infection.

Indexed as

AdultChlamydia InfectionsChlamydia trachomatisCohort StudiesFemaleGestational AgeHumansInfant, Low Birth WeightInfant, NewbornNetherlandsPregnancyPregnancy OutcomePremature BirthProspective StudiesRisk Factors

Identifiers

PMID21538042
PMCPMC3115062
OpenAlexW2111060743

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.