Evidence map›Paper›PMID 29175171›Full record

Observational studyPregnancy hypertension2018

Early warning system hypertension thresholds to predict adverse outcomes in pre-eclampsia: A prospective cohort study.

Hannah L Nathan, Paul T Seed, Natasha L Hezelgrave, Annemarie De Greeff, Elodie Lawley, John Anthony, David R Hall, Wilhelm Steyn, Lucy C Chappell, Andrew H Shennan

Open access · hybridAbstract readMulticenter StudyObservational Study
In one paragraph

Observational study in Pregnancy hypertension, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
5.0field-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

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 37 citations in OpenAlex.

  1. Pooled it
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  17. Blood pressure measurement in special populations and circumstances.Journal of clinical hypertension (Greenwich, Conn.) · 2018
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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

10 authors at 3 institutions in 2 countries.

Hannah L NathanWomen's Health Academic Centre, 10th Floor, North Wing, St Thomas' Hospital, Westminster Bridge Road, King's College London, London SE1 7EH, UK. Electronic address: Hannah.nathan@kcl.ac.uk.
Paul T SeedWomen's Health Academic Centre, 10th Floor, North Wing, St Thomas' Hospital, Westminster Bridge Road, King's College London, London SE1 7EH, UK. Electronic address: Paul.seed@kcl.ac.uk.
Natasha L HezelgraveWomen's Health Academic Centre, 10th Floor, North Wing, St Thomas' Hospital, Westminster Bridge Road, King's College London, London SE1 7EH, UK. Electronic address: natasha.hezelgrave@kcl.ac.uk.
Annemarie De GreeffWomen's Health Academic Centre, 10th Floor, North Wing, St Thomas' Hospital, Westminster Bridge Road, King's College London, London SE1 7EH, UK. Electronic address: annemarie.de_greeff@kcl.ac.uk.
Elodie LawleyWomen's Health Academic Centre, 10th Floor, North Wing, St Thomas' Hospital, Westminster Bridge Road, King's College London, London SE1 7EH, UK. Electronic address: elodie.lawley@kcl.ac.uk.
John AnthonyMaternity Centre, Groote Schuur Hospital, University of Cape Town, Main Road, Observatory, Cape Town 7935, South Africa. Electronic address: john.anthony@uct.ac.za.
David R HallDepartment of Obstetrics and Gynaecology, Tygerberg Hospital, Stellenbosch University, Francie Van Zijl Drive, Cape Town 7500, South Africa. Electronic address: drh@sun.ac.za.
Wilhelm SteynDepartment of Obstetrics and Gynaecology, Tygerberg Hospital, Stellenbosch University, Francie Van Zijl Drive, Cape Town 7500, South Africa. Electronic address: dws@sun.ac.za.
Lucy C ChappellWomen's Health Academic Centre, 10th Floor, North Wing, St Thomas' Hospital, Westminster Bridge Road, King's College London, London SE1 7EH, UK. Electronic address: lucy.chappell@kcl.ac.uk.
Andrew H ShennanWomen's Health Academic Centre, 10th Floor, North Wing, St Thomas' Hospital, Westminster Bridge Road, King's College London, London SE1 7EH, UK. Electronic address: andrew.shennan@kcl.ac.uk.
St Thomas' Hospital · GBStellenbosch University · ZAUniversity of Cape Town · ZA

Funding

Department of Health DRF-2013-06-171Department of Health RP-2014-05-019Medical Research Council MR/N006240/1
6 · The paper itself

Abstract

objectivesTo evaluate the association between blood pressure (BP) measurements and adverse outcomes in women with pre-eclampsia. STUDY

designA prospective cohort study of women with pre-eclampsia admitted to three South African tertiary facilities. BP was measured using the CRADLE Vital Signs Alert (VSA), incorporated with a traffic light early warning system; green: systolic BP <140 mmHg and diastolic BP <90 mmHg, yellow: systolic BP 140-159 and/or diastolic BP 90-109 mmHg (but neither is above the upper threshold), red: systolic BP ≥160 mmHg and/or diastolic BP ≥110 mmHg.

main outcome measuresMaternal: death, eclampsia, stroke, kidney injury; process measures: magnesium sulfate use, Critical Care Unit (CCU) admission; perinatal: stillbirth, neonatal death, preterm delivery.

resultsOf 1547 women with pre-eclampsia (including 42 twin pregnancies), 33.0% of women triggered a red light on admission and 78.6% at their highest BP. Severe hypertension and adverse outcomes were common across yellow and red categories. Comparing admission red to yellow lights, there was a significant increase in kidney injury (OR 1.74, CI 1.31-2.33, trend test p = .003), magnesium sulfate use (OR 3.40, CI 2.24-5.18, p < .001) and CCU admission (OR 1.50, CI 1.18-1.91, p < .001), but not for maternal death, eclampsia, extended perinatal death or preterm delivery.

conclusionThe CRADLE VSA, with integrated traffic light early warning system, can identify women who are hypertensive, at increased risk of severe pre-eclampsia complications and in need of escalation of care. Women who triggered a red light were at increased risk of kidney injury, magnesium sulfate use and CCU admission.

Indexed as

Blood PressureClinical AlarmsAdultBlood Pressure DeterminationDisease ProgressionEarly DiagnosisFemaleHumansLogistic ModelsMaternal DeathOdds RatioPerinatal DeathPredictive Value of TestsPre-EclampsiaPregnancyPrognosisBlood pressureEarly warning systemHypertensionPre-eclampsia

Identifiers

PMID29175171
PMCPMC6008490
OpenAlexW2770533880

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.