Evidence map›Paper›PMID 25626593›Full record

ArticleBJOG : an international journal of obstetrics and gynaecology2015

Previous miscarriage and the subsequent risk of preterm birth in Scotland, 1980-2008: a historical cohort study.

C Oliver-Williams, M Fleming, A M Wood, Gcs Smith

Open access · hybridAbstract read
In one paragraph

Article in BJOG : an international journal of obstetrics and gynaecology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 3 pooled it
6.3field-weighted citation impact, top 4% 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

30 citing papers in PubMed, 3 syntheses or guidelines pooled it, 54 citations in OpenAlex.

  1. Pooled it
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  3. Association of Angiotensin-Converting Enzyme Insertion/Deletion Polymorphism with Recurrent Pregnancy Loss: a Meta-Analysis of 26 Case-Control Studies.Revista brasileira de ginecologia e obstetricia : revista da Federacao Brasileira das Sociedades de Ginecologia e Obstetricia · 2018
    Pooled it
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  8. Preterm birth recurrence after spontaneous preterm birth between 16-28 weeks: A national cohort study.European journal of obstetrics & gynecology and reproductive biology: X · 2024
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  15. Iatrogenic and spontaneous preterm birth in England: A population-based cohort study.BJOG : an international journal of obstetrics and gynaecology · 2023
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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 2 institutions in 1 country.

C Oliver-WilliamsDepartment of Public Health and Primary Care, University of Cambridge, Cambridge, UK.
M FlemingInformation Services Division, NHS National Services Scotland, Edinburgh, UK.
A M WoodDepartment of Public Health and Primary Care, University of Cambridge, Cambridge, UK.
Gcs SmithDepartment of Obstetrics and Gynaecology, NIHR Biomedical Research Centre, University of Cambridge, Cambridge, UK.
University of Cambridge · GBNational Health Service Scotland · GB

Funding

British Heart Foundation RG/08/014/24067Medical Research Council G0700463Medical Research Council G0701619Medical Research Council MR/L003120/1
6 · The paper itself

Abstract

objectiveTo determine whether the relationship between previous miscarriage and risk of preterm birth changed over the period 1980-2008, and to determine whether the pattern varied according to the cause of the preterm birth.

designLinked birth databases.

settingAll Scottish NHS hospitals. POPULATION: A total of 732 719 nulliparous women with a first live birth between 1980 and 2008.

methodsRisk was estimated using logistic regression.

main outcome measuresPreterm birth, subdivided by cause (spontaneous, induced with a diagnosis of pre-eclampsia, or induced without a diagnosis of pre-eclampsia) and severity [extreme (24-28 weeks of gestation), moderate (29-32 weeks of gestation), and mild (33-36 weeks of gestation)].

resultsConsistent with previous studies, previous miscarriage was associated with an increased risk of all-cause preterm birth (adjusted odds ratio, aOR 1.26; 95% confidence interval, 95% CI 1.22-1.29). This arose from associations with all subtypes. The strongest association was found with extreme preterm birth (aOR 1.73; 95% CI 1.57-1.90). Risk increased with the number of miscarriages. Women with three or more miscarriages had the greatest risk of all-cause preterm birth (aOR 2.14; 95% CI 1.93-2.38), and the strongest association was with extreme preterm birth (aOR 3.87; 95% CI 2.85-5.26). The strength of the association between miscarriage and preterm birth decreased from 1980 to 2008. This was because of weakening associations with spontaneous preterm birth and induced preterm birth without a diagnosis of pre-eclampsia.

conclusionsThe association between a prior history of miscarriage and the risk of preterm birth declined in Scotland over the period 1980-2008. We speculate that changes in the methods of managing incomplete termination of pregnancy might explain the trend, through reduced cervical damage.

Indexed as

Abortion, HabitualAbortion, SpontaneousAdultCohort StudiesDatabases, FactualFemaleHumansPregnancyPremature BirthProportional Hazards ModelsRiskScotlandYoung AdultMiscarriagepremature birthspontaneous termination of pregnancy

Identifiers

PMID25626593
PMCPMC4611958
OpenAlexW1968098635

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LicenceCC BY
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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.