Evidence map›Paper›PMID 33417320›Full record

ArticleObstetrics and gynecology2021

Postpartum-Specific Vital Sign Reference Ranges.

Lauren J Green, Rebecca Pullon, Lucy H Mackillop, Stephen Gerry, Jacqueline Birks, Dario Salvi, Shaun Davidson, Lise Loerup, Lionel Tarassenko, Jude Mossop and 6 more

Open access · hybridAbstract read
In one paragraph

Article in Obstetrics and gynecology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
7.0field-weighted citation impact, top 3% 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

14 citing papers in PubMed, 30 citations in OpenAlex.

  1. Trial
  2. Article
  3. Article
  4. Reducing post-cesarean sepsis: Current best practice in prevention and treatment.International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics · 2025
    Article
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  8. Article
  9. Article
  10. Article
  11. Article
  12. Dengue in Pregnancy: A Southeast Asian Perspective.Tropical medicine and infectious disease · 2023
    Review
  13. How should we interpret lactate in labour? A reference study.BJOG : an international journal of obstetrics and gynaecology · 2022
    Article
  14. 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

16 authors at 1 institution in 1 country.

Lauren J GreenNuffield Department of Clinical Neurosciences, the Institute of Biomedical Engineering, Department of Engineering Science, the Nuffield Department of Women's & Reproductive Health, and the Centre for Statistics in Medicine, University of Oxford, Oxford, United Kingdom; the Department of Anaesthesia, Wellington Hospital, Wellington, New Zealand; and Guy's and St Thomas' NHS Foundation Trust and the Department of Women and Children's Health, King's College, London, and the National Perinatal Epidemiology Unit and the Oxford National Institute for Health Research Biomedical Research Centre, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom.
Rebecca Pullon
Lucy H Mackillop
Stephen Gerry
Jacqueline Birks
Dario Salvi
Shaun Davidson
Lise Loerup
Lionel Tarassenko
Jude Mossop
Clare Edwards
Rupert Gauntlett
Kate Harding
Lucy C Chappell
Marian Knight
Peter J Watkinson
Nuffield Foundation · GB

Funding

Department of Health DRF-2016-09-073Department of Health RP-2014-05-019
6 · The paper itself

Abstract

objectiveTo estimate normal ranges for postpartum maternal vital signs.

methodsWe conducted a multicenter prospective longitudinal cohort study in the United Kingdom. We recruited women before 20 weeks of gestation without significant comorbidities and with accurately dated singleton pregnancies. Women recorded their own blood pressure, heart rate, oxygen saturation and temperature daily for 2 weeks postpartum. Trained midwives measured participants' vital signs including respiratory rate around postpartum days 1, 7, and 14.

resultsFrom August 2012 to September 2016, we screened 4,279 pregnant women; 1,054 met eligibility criteria and chose to take part. Postpartum vital sign data were available for 909 women (86.2%). Median, or 50th centile (3rd-97th centile), systolic and diastolic blood pressures increased from the day of birth: 116 mm Hg (88-147) and 74 mm Hg (59-93) to a maximum median of 121 mm Hg (102-143) and 79 mm Hg (63-94) on days 5 and 6 postpartum, respectively, an increase of 5 mm Hg (95% CI 3-7) and 5 mm Hg (95% CI 4-6), respectively. Median (3rd-97th centile) systolic and diastolic blood pressure returned to 116 mm Hg (98-137) and 75 mm Hg (61-91) by day 14 postpartum. The median (3rd-97th centile) heart rate was highest on the day of birth, 84 beats per minute (bpm) (59-110) decreasing to a minimum of 75 bpm (55-101) 14 days postpartum. Oxygen saturation, respiratory rate, and temperature did not change in the 2 weeks postbirth. Median (3rd-97th centile) day-of-birth oxygen saturation was 96% (93-98). Median (3rd-97th centile) day-of-birth respiratory rate was 15 breaths per minute (10-22). Median (3rd-97th centile) day-of-birth temperature was 36.7°C (35.6-37.6).

conclusionWe present widely relevant, postpartum, day-specific reference ranges which may facilitate early detection of abnormal blood pressure, heart rate, respiratory rate, oxygen saturation and temperature during the puerperium. Our findings could inform construction of an evidence-based modified obstetric early warning system to better identify unwell postpartum women. CLINICAL

trial registrationISRCTN, 10838017.

Indexed as

Vital SignsAdultFemaleHumansPostpartum PeriodReference Values

Identifiers

PMID33417320
PMCPMC7813441
OpenAlexW3118570189

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.