Evidence map›Paper›PMID 32363701›Full record

SynthesisBJOG : an international journal of obstetrics and gynaecology2021

Cerebroplacental ratio in predicting adverse perinatal outcome: a meta-analysis of individual participant data.

C A Vollgraff Heidweiller-Schreurs, I R van Osch, M W Heymans, W Ganzevoort, L J Schoonmade, C J Bax, Bwj Mol, Cjm de Groot, Pmm Bossuyt, M A de Boer and 1 more

Abstract readMeta-Analysis
In one paragraph

Synthesis in BJOG : an international journal of obstetrics and gynaecology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 4 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

18 citing papers in PubMed, 4 syntheses or guidelines pooled it.

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  17. Fetal cerebral blood-flow redistribution: analysis of Doppler reference charts and association of different thresholds with adverse perinatal outcome.Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology · 2021
    Observational
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors.

C A Vollgraff Heidweiller-SchreursDepartment of Obstetrics and Gynaecology, Reproduction and Development, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.ORCID 0000-0002-4966-8605
I R van OschDepartment of Obstetrics and Gynaecology, Reproduction and Development, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
M W HeymansDepartment of Epidemiology and Biostatistics, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
W GanzevoortDepartment of Obstetrics and Gynaecology, Reproduction and Development, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
L J SchoonmadeDepartment of Medical Library, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
C J BaxDepartment of Obstetrics and Gynaecology, Reproduction and Development, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Bwj MolDepartment of Obstetrics and Gynaecology, Monash University, Clayton, Vic., Australia.ORCID 0000-0001-8337-550X
Cjm de GrootDepartment of Obstetrics and Gynaecology, Reproduction and Development, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
Pmm BossuytDepartment of Clinical Epidemiology, Biostatistics and Bioinformatics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
M A de BoerDepartment of Obstetrics and Gynaecology, Reproduction and Development, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
CPR IPD Study Group

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo investigate if cerebroplacental ratio (CPR) adds to the predictive value of umbilical artery pulsatility index (UA PI) alone - standard of practice - for adverse perinatal outcome in singleton pregnancies. DESIGN AND

settingMeta-analysis based on individual participant data (IPD). POPULATION OR SAMPLE: Ten centres provided 17 data sets for 21 661 participants, 18 731 of which could be included. Sample sizes per data set ranged from 207 to 9215 individuals. Patient populations varied from uncomplicated to complicated pregnancies.

methodsIn a collaborative, pooled analysis, we compared the prognostic value of combining CPR with UA PI, versus UA PI only and CPR only, with a one-stage IPD approach. After multiple imputation of missing values, we used multilevel multivariable logistic regression to develop prediction models. We evaluated the classification performance of all models with receiver operating characteristics analysis. We performed subgroup analyses according to gestational age, birthweight centile and estimated fetal weight centile.

main outcome measuresComposite adverse perinatal outcome, defined as perinatal death, caesarean section for fetal distress or neonatal unit admission.

resultsAdverse outcomes occurred in 3423 (18%) participants. The model with UA PI alone resulted in an area under the curve (AUC) of 0.775 (95% CI 0.709-0.828) and with CPR alone in an AUC of 0.778 (95% CI 0.715-0.831). Addition of CPR to the UA PI model resulted in an increase in the AUC of 0.003 points (0.778, 95% CI 0.714-0.831). These results were consistent across all subgroups.

conclusionsCerebroplacental ratio added no predictive value for adverse perinatal outcome beyond UA PI, when assessing singleton pregnancies, irrespective of gestational age or fetal size. TWEETABLE ABSTRACT: Doppler measurement of cerebroplacental ratio in clinical practice has limited added predictive value to umbilical artery alone.

Indexed as

Ultrasonography, DopplerUltrasonography, PrenatalFemaleHumansMiddle Cerebral ArteryPredictive Value of TestsPregnancyPregnancy ComplicationsPulsatile FlowUmbilical ArteriesCerebroplacental ratioDopplerfetal growth restrictionindividual participant datameta-analysismiddle cerebral arteryprognostic accuracy

Identifiers

PMID32363701
PMCPMC7818434

What OpenQuestion holds

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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.