Evidence map›Paper›PMID 38777357›Full record

ArticleBMJ (Clinical research ed.)2024

Epidural analgesia during labour and severe maternal morbidity: population based study.

Rachel J Kearns, Aizhan Kyzayeva, Lucy O E Halliday, Deborah A Lawlor, Martin Shaw, Scott M Nelson

Abstract read
In one paragraph

Article in BMJ (Clinical research ed.), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
–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

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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

22 citing papers in PubMed.

  1. Observational
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  13. Revista panamericana de salud publica = Pan American journal of public health · 2026
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  14. Revista panamericana de salud publica = Pan American journal of public health · 2026
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors.

Rachel J KearnsDepartment of Anaesthesia, Glasgow Royal Infirmary, Glasgow, UK rachel.kearns@glasgow.ac.uk.ORCID 0000-0001-6156-6858
Aizhan KyzayevaSchool of Medicine, University of Glasgow, Glasgow Royal Infirmary, Glasgow, G31 2ER, UK.
Lucy O E HallidaySchool of Medicine, University of Glasgow, Glasgow Royal Infirmary, Glasgow, G31 2ER, UK.
Deborah A LawlorMRC Integrative Epidemiology Unit at the University of Bristol, Bristol, UK.
Martin ShawSchool of Medicine, University of Glasgow, Glasgow Royal Infirmary, Glasgow, G31 2ER, UK.
Scott M NelsonSchool of Medicine, University of Glasgow, Glasgow Royal Infirmary, Glasgow, G31 2ER, UK.

Funding

British Heart Foundation CH/F/20/90003
6 · The paper itself

Abstract

objectivesTo determine the effect of labour epidural on severe maternal morbidity (SMM) and to explore whether this effect might be greater in women with a medical indication for epidural analgesia during labour, or with preterm labour.

designPopulation based study.

settingAll NHS hospitals in Scotland.

participants567 216 women in labour at 24+0 to 42+6 weeks' gestation between 1 January 2007 and 31 December 2019, delivering vaginally or through unplanned caesarean section.

main outcome measuresThe primary outcome was SMM, defined as the presence of ≥1 of 21 conditions used by the US Centers for Disease Control and Prevention (CDC) as criteria for SMM, or a critical care admission, with either occurring at any point from date of delivery to 42 days post partum (described as SMM). Secondary outcomes included a composite of ≥1 of the 21 CDC conditions and critical care admission (SMM plus critical care admission), and respiratory morbidity.

resultsOf the 567 216 women, 125 024 (22.0%) had epidural analgesia during labour. SMM occurred in 2412 women (4.3 per 1000 births, 95% confidence interval (CI) 4.1 to 4.4). Epidural analgesia was associated with a reduction in SMM (adjusted relative risk 0.65, 95% CI 0.50 to 0.85), SMM plus critical care admission (0.46, 0.29 to 0.73), and respiratory morbidity (0.42, 0.16 to 1.15), although the last of these was underpowered and had wide confidence intervals. Greater risk reductions in SMM were detected among women with a medical indication for epidural analgesia (0.50, 0.34 to 0.72) compared with those with no such indication (0.67, 0.43 to 1.03; P<0.001 for difference). More marked reductions in SMM were seen in women delivering preterm (0.53, 0.37 to 0.76) compared with those delivering at term or post term (1.09, 0.98 to 1.21; P<0.001 for difference). The observed reduced risk of SMM with epidural analgesia was increasingly noticeable as gestational age at birth decreased in the whole cohort, and in women with a medical indication for epidural analgesia.

conclusionEpidural analgesia during labour was associated with a 35% reduction in SMM, and showed a more pronounced effect in women with medical indications for epidural analgesia and with preterm births. Expanding access to epidural analgesia for all women during labour, and particularly for those at greatest risk, could improve maternal health.

Indexed as

Analgesia, EpiduralAnalgesia, ObstetricalAdultFemaleHumansLabor, ObstetricObstetric Labor, PrematurePregnancyScotlandYoung Adult

Identifiers

PMID38777357
PMCPMC11109902

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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.