Evidence map›Paper›PMID 17950960›Full record

ArticleVaccine2007

Clearing asymptomatic parasitaemia increases the specificity of the definition of mild febrile malaria.

Philip Bejon, Tabitha Mwangi, Brett Lowe, Norbert Peshu, Adrian V S Hill, Kevin Marsh

Open access · hybridAbstract read
In one paragraph

Article in Vaccine, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
1.0field-weighted citation impact, top 21% 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

5 citing papers in PubMed, 7 citations in OpenAlex.

  1. Trial
  2. Article
  3. Article
  4. Article
  5. 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

6 authors at 2 institutions in 2 countries.

Philip BejonKenya Medical Research Institute, Centre for Geographical Medicine Research (Coast), Kenya. pbejon@kilifi.kemri-wellcome.org
Tabitha Mwangi
Brett Lowe
Norbert Peshu
Adrian V S Hill
Kevin Marsh
Kenya Medical Research Institute · KECentre for Human Genetics · GB

Funding

Wellcome Trust 077092
6 · The paper itself

Abstract

In clinical trials, the specificity of the disease endpoint is critical to an accurate estimate of vaccine efficacy. We used a logistic regression model to analyse parasite densities among children before and after treatment with antimalarials, in order to estimate the impact that clearing asymptomatic parasitaemia had on the specificity of the endpoint of febrile malaria. The malaria attributable fever fraction was higher after antimalarial treatment (i.e. fever and parasitaemia were more likely to be causally related), implying that drug treatment prior to monitoring decreased the misclassification of febrile malaria. In intervention studies with febrile malaria as an endpoint, clearing asymptomatic parasitaemia increases the study's power more effectively than raising the threshold parasitaemia.

Indexed as

AntimalarialsBody TemperatureChildClinical Trials as TopicFeverHumansLogistic ModelsMalariaMalaria, FalciparumParasitemiaRegression AnalysisAntimalarials

Identifiers

PMID17950960
PMCPMC2702749
OpenAlexW2023263769

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.