Evidence map›Paper›PMID 34582452›Full record

Observational studyPLoS medicine2021

Neurocognitive outcomes in Malawian children exposed to malaria during pregnancy: An observational birth cohort study.

Andrea M Weckman, Andrea L Conroy, Mwayiwawo Madanitsa, Bruno Gnaneswaran, Chloe R McDonald, Linda Kalilani-Phiri, Jaya Chandna, Doreen Ali, Victor Mwapasa, Carole Khairallah and 6 more

Abstract readObservational Study
In one paragraph

Observational study in PLoS medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 2 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

17 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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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

16 authors.

Andrea M WeckmanDepartment of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.ORCID 0000-0002-2200-4008
Andrea L ConroyDepartment of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America.ORCID 0000-0002-5328-6511
Mwayiwawo MadanitsaCollege of Medicine, University of Malawi, Blantyre, Malawi.ORCID 0000-0002-4743-9382
Bruno GnaneswaranWomen and Children's Health, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, United Kingdom.ORCID 0000-0002-6401-7878
Chloe R McDonaldGrand Challenges Canada, Toronto General Hospital, University Health Network, Toronto, Ontario, Canada.ORCID 0000-0002-2820-4991
Linda Kalilani-PhiriCollege of Medicine, University of Malawi, Blantyre, Malawi.
Jaya ChandnaDepartment of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom.ORCID 0000-0001-9836-0554
Doreen AliDepartment of Preventive Health Services, Ministry of Health, Lilongwe, Malawi.
Victor MwapasaCollege of Medicine, University of Malawi, Blantyre, Malawi.
Carole KhairallahDepartment of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom.
Kyaw Lay ThwaiDepartment of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America.
Steven R MeshnickDepartment of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America.
Steve M TaylorDepartment of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America.ORCID 0000-0002-2783-0990
Feiko O Ter KuileDepartment of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom.ORCID 0000-0003-3663-5617
Kevin C KainDepartment of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.ORCID 0000-0001-6068-1272
Melissa GladstoneWomen and Children's Health, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, United Kingdom.ORCID 0000-0002-2579-9301

Funding

CIHR FDN-148439CIHR GSD-157907Medical Research Council MC_PC_MR/P006914/1
6 · The paper itself

Abstract

backgroundAnnually 125 million pregnancies are at risk of malaria infection. However, the impact of exposure to malaria in pregnancy on neurodevelopment in children is not well understood. We hypothesized that malaria in pregnancy and associated maternal immune activation result in neurodevelopmental delay in exposed offspring. METHODS AND

findingsBetween April 2014 and April 2015, we followed 421 Malawian mother-baby dyads (median [IQR] maternal age: 21 [19, 28] years) who were previously enrolled (median [IQR] gestational age at enrollment: 19.7 [17.9, 22.1] weeks) in a randomized controlled malaria prevention trial with 5 or 6 scheduled assessments of antenatal malaria infection by PCR. Children were evaluated at 12, 18, and/or 24 months of age with cognitive tests previously validated in Malawi: the Malawi Developmental Assessment Tool (MDAT) and the MacArthur-Bates Communicative Development Inventories (MCAB-CDI). We assessed the impact of antenatal malaria (n [%] positive: 240 [57.3]), placental malaria (n [%] positive: 112 [29.6]), and maternal immune activation on neurocognitive development in children. Linear mixed-effects analysis showed that children exposed to antenatal malaria between 33 and 37 weeks gestation had delayed language development across the 2-year follow-up, as measured by MCAB-CDI (adjusted beta estimate [95% CI], -7.53 [-13.04, -2.02], p = 0.008). Maternal immune activation, characterized by increased maternal sTNFRII concentration, between 33 and 37 weeks was associated with lower MCAB-CDI language score (adjusted beta estimate [95% CI], -8.57 [-13.09, -4.06], p < 0.001). Main limitations of this study include a relatively short length of follow-up and a potential for residual confounding that is characteristic of observational studies.

conclusionsThis mother-baby cohort presents evidence of a relationship between malaria in pregnancy and neurodevelopmental delay in offspring. Malaria in pregnancy may be a modifiable risk factor for neurodevelopmental injury independent of birth weight or prematurity. Successful interventions to prevent malaria during pregnancy may reduce the risk of neurocognitive delay in children.

Indexed as

Pregnancy Complications, InfectiousCohort StudiesFemaleHumansInfantInfectious Disease Transmission, VerticalLanguage Development DisordersMalariaMalawiMaleNeurocognitive DisordersNeuropsychological TestsPregnancy

Identifiers

PMID34582452
PMCPMC8478258

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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.