Evidence map›Paper›PMID 31280724›Full record

ArticleBMC medicine2019

Observational study: 27 years of severe malaria surveillance in Kilifi, Kenya.

Patricia Njuguna, Kathryn Maitland, Amek Nyaguara, Daniel Mwanga, Polycarp Mogeni, Neema Mturi, Shebe Mohammed, Gabriel Mwambingu, Caroline Ngetsa, Kenedy Awuondo and 16 more

Open access · goldAbstract read
In one paragraph

Article in BMC medicine, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 2 pooled it
6.4field-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

33 citing papers in PubMed, 2 syntheses or guidelines pooled it, 61 citations in OpenAlex.

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  10. Malaria-Associated Mortality in the 19th Century.The American journal of tropical medicine and hygiene · 2025
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  16. eLife · 2023
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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

26 authors at 4 institutions in 2 countries.

Patricia NjugunaKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Kathryn MaitlandKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Amek NyaguaraKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Daniel MwangaKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Polycarp MogeniKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Neema MturiKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Shebe MohammedKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Gabriel MwambinguKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Caroline NgetsaKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Kenedy AwuondoKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Brett LoweKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Ifedayo AdetifaKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
J Anthony G ScottKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Thomas N WilliamsKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Sarah AtkinsonKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Faith OsierKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Robert W SnowKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Kevin MarshKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Benjamin TsofaKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Norbert PeshuKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Mainga HamalubaKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
James A BerkleyKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
Charles R J NewtonKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya.
John FondoKilifi County Department of Health, Kilifi, Kenya.
Anisa OmarKilifi County Department of Health, Kilifi, Kenya.
Philip BejonKEMRI-Wellcome Trust Research Programme, CGMR-C, KEMRI, PO Box 230, Kilifi, Kenya. pbejon@kemri-wellcome.org.
Kenya Medical Research Institute · KEUniversity of Oxford · GBMoving the GoalPosts · KELondon School of Hygiene & Tropical Medicine · GB

Funding

Wellcome TrustWellcome Trust 203077_Z_16_Z
6 · The paper itself

Abstract

backgroundMany parts of Africa have witnessed reductions in Plasmodium falciparum transmission over the last 15 years. Since immunity to malaria is acquired more rapidly at higher transmission, the slower acquisition of immunity at lower transmission may partially offset the benefits of reductions in transmission. We examined the clinical spectrum of disease and predictors of mortality after sustained changes in transmission intensity, using data collected from 1989 to 2016.

methodsWe conducted a temporal observational analysis of 18,000 children, aged 14 days to 14 years old, who were admitted to Kilifi County Hospital, Kenya, from 1989 to 2016 with malaria. We describe the trends over time of the clinical and laboratory criteria for severe malaria and associated risk of mortality.

resultsDuring the time periods 1989-2003, 2004-2008, and 2009-2016, Kilifi County Hospital admitted averages of 657, 310, and 174 cases of severe malaria per year including averages of 48, 14, and 12 malaria-associated deaths per year, respectively. The median ages in years of children admitted with cerebral malaria, severe anaemia, and malaria-associated mortality were 3.0 (95% confidence interval (CI) 2.2-3.9), 1.1 (95% CI 0.9-1.4), and 1.1 (95% CI 0.3-2.2) in the year 1989, rising to 4.9 (95% CI 3.9-5.9), 3.8 (95% CI 2.5-7.1), and 5 (95% CI 3.3-6.3) in the year 2016. The ratio of children with cerebral malaria to severe anaemia rose from 1:2 before 2004 to 3:2 after 2009. Hyperparasitaemia was a risk factor for death after 2009 but not in earlier time periods.

conclusionDespite the evidence of slower acquisition of immunity, continued reductions in the numbers of cases of severe malaria resulted in lower overall mortality. Our temporal data are limited to a single site, albeit potentially applicable to a secular trend present in many parts of Africa.

Indexed as

Child, PreschoolFemaleHumansInfantKenyaMalaria, CerebralMalaria, FalciparumMaleObservational Studies as TopicProspective StudiesRisk FactorsAfricaLongitudinal surveillanceMortalitySecular trendSevere malaria

Identifiers

PMID31280724
PMCPMC6613255
OpenAlexW2955088880

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.