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.
journal_name
Vaccinejournal_title
Vaccineauthors
Bejon P,Mwangi T,Lowe B,Peshu N,Hill AV,Marsh Kdoi
10.1016/j.vaccine.2007.07.057subject
Has Abstractpub_date
2007-11-23 00:00:00pages
8198-202issue
48eissn
0264-410Xissn
1873-2518pii
S0264-410X(07)00894-8journal_volume
25pub_type
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