Evidence map›Paper›PMID 31234879›Full record

ArticleMalaria journal2019

Epidemiological risk factors for clinical malaria infection in the highlands of Western Kenya.

Walters M Essendi, Anne M Vardo-Zalik, Eugenia Lo, Maxwell G Machani, Guofa Zhou, Andrew K Githeko, Guiyun Yan, Yaw A Afrane

Open access · goldAbstract read
In one paragraph

Article in Malaria journal, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
7.8field-weighted citation impact, top 2% 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

28 citing papers in PubMed, 53 citations in OpenAlex.

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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

8 authors at 6 institutions in 3 countries.

Walters M EssendiBiological Sciences Department, Egerton University, Egerton, Kenya.
Anne M Vardo-ZalikThe Pennsylvania State University, 1031 Edgecomb Avenue, York, PA, 1740, USA.
Eugenia LoDepartment of Biological Sciences, University of North Carolina at Charlotte, Woodward Hall 380C, 9201 University City Blvd, Charlotte, NC, 28223, USA.
Maxwell G MachaniClimate and Human Health Research Unit, Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya.
Guofa ZhouProgram in Public Health, College of Health Sciences, University of California, Irvine, CA, 92697, USA.
Andrew K GithekoClimate and Human Health Research Unit, Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya.
Guiyun YanProgram in Public Health, College of Health Sciences, University of California, Irvine, CA, 92697, USA.
Yaw A AfraneDepartment of Medical Microbiology, College of Health Sciences, University of Ghana, Accra, Ghana. yaw_afrane@yahoo.com.ORCID http://orcid.org/0000-0001-6576-523X
Kenya Medical Research Institute · KEUniversity of California, Irvine · USEgerton University · KEPennsylvania State University · USUniversity of Ghana · GHUniversity of North Carolina at Charlotte · US

Funding

Vector Biology of Invasive Anopheles stephensi in Rural to Urban Landscapes in EthiopiaU19AI129326 · NIAID · UNIVERSITY OF CALIFORNIA-IRVINE · PI Guiyun Yan · 2017 to 2026
$19.9M
Ecology of African Highland MalariaR01AI050243 · NIAID · UNIVERSITY OF CALIFORNIA-IRVINE · PI YAN, GUIYUN · 2001 to 2018
$8.8M
Research Training in Mosquito Genomics and Bioinformat*D43TW001505 · FIC · UNIVERSITY OF CALIFORNIA-IRVINE · PI Guiyun Yan · 2000 to 2026
$6.0M
EPIDEMIOLOGY OF CLINICAL MALARIA IN WESTERN KENYA HIGHLANDSR01AI094580 · NIAID · KENYA MEDICAL RESEARCH INSTITUTE (KEMRI) · PI AFRANE, YAW ASARE · 2011 to 2015
$267k
FIC NIH HHS D43 TW001505NIAID NIH HHS R01 AI050243NIAID NIH HHS R01 AI094580NIAID NIH HHS U19 AI129326NIH HHS D43 TW001505NIH HHS R01 AI050243NIH HHS RO1 AI094580
6 · The paper itself

Abstract

backgroundUnderstanding the complex heterogeneity of risk factors that can contribute to an increased risk of malaria at the individual and household level will enable more effective use of control measures. The objective of this study was to understand individual and household factors that influence clinical malaria infection among individuals in the highlands of Western Kenya.

methodsThis was a matched case-control study undertaken in the Western Kenya highlands. Clinical malaria cases were recruited from health facilities and matched to asymptomatic individuals from the community who served as controls. Each participant was screened for malaria using microscopy. Follow-up surveys were conducted with individual households to collect socio-economic data. The houses were also checked using pyrethrum spray catches to collect mosquitoes.

resultsA total of 302 malaria cases were matched to 604 controls during the surveillance period. Mosquito densities were similar in the houses of both groups. A greater percentage of people in the control group (64.6%) used insecticide-treated bed nets (ITNs) compared to the families of malaria cases (48.3%). Use of ITNs was associated with lower level of clinical malaria episodes (odds ratio 0.51; 95% CI 0.39-0.68; P < 0.0001). Low income was the most important factor associated with higher malaria infections (adj. OR 4.70). Use of malaria prophylaxis was the most important factor associated with less malaria infections (adj OR 0.36). Mother's (not fathers) employment status (adj OR 0.48) and education level (adj OR 0.54) was important malaria risk factor. Houses with open eaves was an important malaria risk factor (adj OR 1.72).

conclusionThe identification of risk factors for clinical malaria infection provides information on the local malaria epidemiology and has the potential to lead to a more effective and targeted use of malaria control measures. These risk factors could be used to assess why some individuals acquire clinical malaria whilst others do not and to inform how intervention could be scaled at the local level.

Indexed as

AdolescentAdultAnimalsCase-Control StudiesChildChild, PreschoolCulicidaeFemaleHousingHumansInfantInsecticide-Treated BednetsKenyaLogistic ModelsMalariaMaleCase–control studyClinical malariaHouse designMalaria risk factorsWestern Kenya

Identifiers

PMID31234879
PMCPMC6591804
OpenAlexW2949872837

What OpenQuestion holds

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LicenceCC BY
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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.