Evidence map›Paper›PMID 32010991›Full record

ArticlePaediatric and perinatal epidemiology2020

A national population-based cohort study to investigate inequalities in maternal mortality in the United Kingdom, 2009-17.

Marian Knight, Kathryn Bunch, Sara Kenyon, Derek Tuffnell, Jennifer J Kurinczuk

Abstract read
In one paragraph

Article in Paediatric and perinatal epidemiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 2 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, 2 syntheses or guidelines pooled it.

  1. Pooled it
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  9. The Burden of Poor Reproductive Health in England: Results From a Cross-Sectional Survey.BJOG : an international journal of obstetrics and gynaecology · 2025
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  18. Birth Experiences, Breastfeeding, and the Mother-Child Relationship: Evidence from a Large Sample of Mothers.The Canadian journal of nursing research = Revue canadienne de recherche en sciences infirmieres · 2022
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  19. Review
  20. Article
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.

Marian KnightNational Perinatal Epidemiology Unit, University of Oxford, Oxford, UK.ORCID 0000-0002-1984-4575
Kathryn BunchNational Perinatal Epidemiology Unit, University of Oxford, Oxford, UK.
Sara KenyonInstitute of Health Sciences, University of Birmingham, Birmingham, UK.
Derek TuffnellBradford Hospitals NHS Foundation Trust, Bradford, UK.
Jennifer J KurinczukNational Perinatal Epidemiology Unit, University of Oxford, Oxford, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDisparities have been documented in maternal mortality rates between women from different ethnic, age and socio-economic groups in the UK. It is unclear whether there are differential changes in these rates amongst women from different groups over time. The objectives of this analysis were to describe UK maternal mortality rates in different age, ethnic and socio-economic groups between 2009 and 2017, and to identify whether there were changes in the observed inequalities, or different trends amongst population subgroups.

methodsMaternal mortality rates with 95% confidence intervals (CI) in specific age, deprivation and ethnic groups were calculated using numbers of maternal deaths as numerator and total maternities as denominator. Relative risks (RR) with 95% CI were calculated and compared using ratios of relative risk. Change over time was investigated using non-parametric tests for trend across ordered groups.

resultsWomen from black and Asian groups had a higher mortality rate than white women in most time periods, as did women aged 35 and over and women from the most deprived quintile areas of residence. There was evidence of an increasing trend in maternal mortality amongst black women and a decrease in mortality amongst women from the least deprived areas, but no trends over time in any of the other ethnic, age or IMD groups were seen. There was a widening of the disparity between black and white women (RR 2.59 in 2009-11 compared with 5.27 in 2015-17, ratio of the relative risks 2.03, 95% CI 1.11, 3.72).

conclusionsThe clear differences in the patterns of maternal mortality amongst different ethnic, age and socio-economic groups emphasise the importance of research and policies focussed specifically on women from black and minority ethnic groups, together with other disadvantaged groups, to begin to reduce maternal mortality in the UK.

Indexed as

Maternal MortalityMortalityRisk AssessmentSocioeconomic FactorsAdultAge FactorsCause of DeathEthnicityFemaleHealthcare DisparitiesHealth Status DisparitiesHumansMaternal AgeMinority HealthNeeds AssessmentPregnancycohort analysisethnic groupsmaternal agematernal mortalitysocio-economic factors

Identifiers

PMID32010991
PMCPMC7383891

What OpenQuestion holds

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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.