Evidence map›Paper›PMID 34225842›Full record

ArticleeLife2021

Improving statistical power in severe malaria genetic association studies by augmenting phenotypic precision.

James A Watson, Carolyne M Ndila, Sophie Uyoga, Alexander Macharia, Gideon Nyutu, Shebe Mohammed, Caroline Ngetsa, Neema Mturi, Norbert Peshu, Benjamin Tsofa and 11 more

Open access · goldAbstract read
In one paragraph

Article in eLife, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 2 pooled it
5.5field-weighted citation impact, top 4% 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

19 citing papers in PubMed, 2 syntheses or guidelines pooled it, 32 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Article
  5. Article
  6. A Qualitative Method To Assess a History of Cerebral Malaria in Malian Children.The American journal of tropical medicine and hygiene · 2025
    Article
  7. Article
  8. Artemisinin-resistant malaria.Clinical microbiology reviews · 2024
    Review
  9. Article
  10. Using Malarial Retinopathy to Improve the Diagnosis of Pediatric Cerebral Malaria.The American journal of tropical medicine and hygiene · 2023
    Article
  11. Article
  12. Article
  13. Severe malaria.Malaria journal · 2022
    Review
  14. Review
  15. eLife · 2022
    Article
  16. Article
  17. Article
  18. Review
  19. Article
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

21 authors at 6 institutions in 4 countries.

James A Watson *Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.ORCID https://orcid.org/0000-0001-5524-0325
Carolyne M Ndila *Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
Sophie UyogaKEMRI-Wellcome Trust Research Programme, Centre for Geographic Medicine Research-Coast, Kilifi, Kenya.
Alexander MachariaKEMRI-Wellcome Trust Research Programme, Centre for Geographic Medicine Research-Coast, Kilifi, Kenya.
Gideon NyutuKEMRI-Wellcome Trust Research Programme, Centre for Geographic Medicine Research-Coast, Kilifi, Kenya.
Shebe MohammedKEMRI-Wellcome Trust Research Programme, Centre for Geographic Medicine Research-Coast, Kilifi, Kenya.
Caroline NgetsaKEMRI-Wellcome Trust Research Programme, Centre for Geographic Medicine Research-Coast, Kilifi, Kenya.
Neema MturiKEMRI-Wellcome Trust Research Programme, Centre for Geographic Medicine Research-Coast, Kilifi, Kenya.
Norbert PeshuKEMRI-Wellcome Trust Research Programme, Centre for Geographic Medicine Research-Coast, Kilifi, Kenya.
Benjamin TsofaKEMRI-Wellcome Trust Research Programme, Centre for Geographic Medicine Research-Coast, Kilifi, Kenya.
Kirk RockettThe Wellcome Sanger Institute, Cambridge, United Kingdom.
Stije LeopoldMahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.ORCID http://orcid.org/0000-0002-0482-5689
Hugh KingstonMahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.ORCID http://orcid.org/0000-0003-1869-8307
Elizabeth C GeorgeMedical Research Council Clinical Trials Unit, University College London, London, United Kingdom.
Kathryn MaitlandKEMRI-Wellcome Trust Research Programme, Centre for Geographic Medicine Research-Coast, Kilifi, Kenya.ORCID http://orcid.org/0000-0002-0007-0645
Nicholas Pj DayMahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.ORCID http://orcid.org/0000-0003-2309-1171
Arjen M DondorpMahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.ORCID http://orcid.org/0000-0001-5190-2395
Philip BejonCentre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.
Thomas N Williams *KEMRI-Wellcome Trust Research Programme, Centre for Geographic Medicine Research-Coast, Kilifi, Kenya.ORCID https://orcid.org/0000-0003-4456-2382
Chris C Holmes *Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.
Nicholas J White *Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.ORCID http://orcid.org/0000-0002-1897-1978
Kenya Medical Research Institute · KEMahidol University · THAngkor Hospital for Children · KHCentre for Human Genetics · GBUniversity College London · GBUniversity of Oxford · GB

Funding

Medical Research Council G0600230Medical Research Council G0600718Medical Research Council G0601027Medical Research Council G0801439Medical Research Council MC_UP_A390_1107Medical Research Council MC_UU_00004/05Medical Research Council MC_UU_12023/26Medical Research Council MR/M006212/1Wellcome Trust 090770/Z/09/ZWellcome Trust 093956/Z/10/CWellcome Trust 202800/Z/16/ZWellcome Trust 203141/Z/16/ZWellcome Trust 204911/Z/16/ZWellcome Trust 206194Wellcome Trust 209265/Z/17/ZWellcome Trust WT077383/Z/05/Z
6 · The paper itself

Abstract

Severe falciparum malaria has substantially affected human evolution. Genetic association studies of patients with clinically defined severe malaria and matched population controls have helped characterise human genetic susceptibility to severe malaria, but phenotypic imprecision compromises discovered associations. In areas of high malaria transmission, the diagnosis of severe malaria in young children and, in particular, the distinction from bacterial sepsis are imprecise. We developed a probabilistic diagnostic model of severe malaria using platelet and white count data. Under this model, we re-analysed clinical and genetic data from 2220 Kenyan children with clinically defined severe malaria and 3940 population controls, adjusting for phenotype mis-labelling. Our model, validated by the distribution of sickle trait, estimated that approximately one-third of cases did not have severe malaria. We propose a data-tilting approach for case-control studies with phenotype mis-labelling and show that this reduces false discovery rates and improves statistical power in genome-wide association studies.

Indexed as

Genome-Wide Association StudyMalariaPhenotypeAdolescentAdultCase-Control StudiesChildChild, PreschoolExtracellular Matrix ProteinsFemaleGenomicsHumansKenyaMalaria, FalciparumMalePolymorphism, GeneticExtracellular Matrix ProteinsFREM3 protein, humancomplete blood countdiagnosisepidemiologygeneticsgenomicsglobal healthGWAShumansevere malaria

Identifiers

PMID34225842
PMCPMC8315799
OpenAlexW3177690130

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.