Evidence map›Paper›PMID 26296450›Full record

SynthesisThe Lancet. Global health2015

Prevalence of malaria infection in pregnant women compared with children for tracking malaria transmission in sub-Saharan Africa: a systematic review and meta-analysis.

Anna M van Eijk, Jenny Hill, Abdisalan M Noor, Robert W Snow, Feiko O ter Kuile

3 registry-linked trialsAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in The Lancet. Global health, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 3 registered trials, which are not on this map. Cited by 74 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
74citing papers in PubMed, 3 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.

NCT04545905 completednot on this mapstarted 2020, after this paper: background citation

Antenatal Care as a Platform for Malaria Surveillance: Utilizing Community Prevalence Measures From the New Nets Project to Validate ANC Surveillance of Malaria in Burkina Faso

TypeobservationalSponsorPATHRan2020 to 2022Enrolled13,350ConditionsMalariaArmsANC surveillance
NCT04724161 completednot on this mapstarted 2020, after this paper: background citation

Antenatal Care as a Platform for Malaria Surveillance: Utilizing Community Prevalence Measures From the New Nets Project to Validate ANC Surveillance of Malaria in Mozambique

TypeobservationalSponsorPATHRan2020 to 2022Enrolled19,215ConditionsMalariaArmsANC surveillance
NCT05072613 completednot on this mapstarted 2021, after this paper: background citation

Pregnant Women Attending Antenatal Care Services as a Sentinel Population for Antimalarial Drug Resistance Genetic Surveillance in Africa

TypeobservationalSponsorUniversity of OxfordRan2021 to 2023Enrolled6,833ConditionsMalariaArmsMalaria screening
3 · Its place in the literature

Who cites it

74 citing papers in PubMed, 3 syntheses or guidelines pooled it.

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  3. Prevalence of Pregnancy Associated Malaria in India.Frontiers in global women's health · 2022
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14 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors.

Anna M van EijkDepartment of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK.
Jenny HillDepartment of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK.
Abdisalan M NoorSpatial Health Metrics Group, Department of Public Health Research, KEMRI-Wellcome Trust Research Program, Nairobi, Kenya; Centre for Tropical Medicine & Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Centre for Clinical Vaccinology and Tropical Medicine, Oxford, UK.
Robert W SnowSpatial Health Metrics Group, Department of Public Health Research, KEMRI-Wellcome Trust Research Program, Nairobi, Kenya; Centre for Tropical Medicine & Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Centre for Clinical Vaccinology and Tropical Medicine, Oxford, UK.
Feiko O ter KuileDepartment of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK.

Funding

Wellcome Trust 079080Wellcome Trust 092654Wellcome Trust 095127Wellcome Trust 103602
6 · The paper itself

Abstract

backgroundIn malarious areas, pregnant women are more likely to have detectable malaria than are their non-pregnant peers, and the excess risk of infection varies with gravidity. Pregnant women attending antenatal clinic for their first visit are a potential pragmatic sentinel group to track the intensity of malaria transmission; however, the relation between malaria prevalence in children, a standard measure to estimate malaria endemicity, and pregnant women has never been compared.

methodsWe obtained data on malaria prevalence in pregnancy from the Malaria in Pregnancy Library (January, 2015) and data for children (0-59 months) were obtained from recently published work on parasite prevalence in Africa and the Malaria in Pregnancy Library. We used random effects meta-analysis to obtain a pooled prevalence ratio (PPR) of malaria in children versus pregnant women (during pregnancy, not at delivery) and by gravidity, and we used meta-regression to assess factors affecting the prevalence ratio.

findingsWe used data from 18 sources that included 57 data points. There was a strong linear relation between the prevalence of malaria infection in pregnant women and children (r=0·87, p<0·0001). Prevalence was higher in children when compared with all gravidae (PPR=1·44, 95% CI 1·29-1·62; I(2)=80%, 57 studies), and against multigravidae (1·94, 1·68-2·24; I(2)=80%, 7 studies), and marginally higher against primigravidae (1·16, 1·05-1·29; I(2)=48%, 8 studies). PPR was higher in areas of higher transmission.

interpretationMalaria prevalence in pregnant women is strongly correlated with prevalence data in children obtained from household surveys, and could provide a pragmatic adjunct to survey strategies to track trends in malaria transmission in Africa.

fundingThe Malaria in Pregnancy Consortium, which is funded through a grant from the Bill & Melinda Gates Foundation to the Liverpool School of Tropical Medicine, UK; US Centers for Disease Control and Prevention; and Wellcome Trust, UK.

Indexed as

AdolescentAdultAfrica South of the SaharaAntimalarialsChildChild, PreschoolFemaleHumansMalariaMaleMiddle AgedPregnancyPregnancy Complications, ParasiticPrevalenceRegression AnalysisYoung AdultAntimalarials

Identifiers

PMID26296450
PMCPMC4673091

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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.