Study Groups

WWARN facilitates a number of collaborative Study Groups to undertake individual patient data meta-analyses to answer specific research questions about malaria treatments and antimalarial drug resistance. Gathering and combining data sets from multiple studies increases sample sizes, so that effects, including smaller effects, and effects on sub-populations can be identified with greater certainty. Working together and combining data from different regions and populations is improving our understanding of drug resistance and strengthening global efforts to control and eventually eliminate malaria.

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Dominic Chavez World Bank
The Dihydroartemisinin-Piperaquine for Intermittent Preventive Treatment in Pregnancy Study Group aims to determine the safety and efficacy of intermi...

The Dihydroartemisinin-Piperaquine for Intermittent Preventive Treatment in Pregnancy Study Group aims to determine the safety and efficacy of intermittent preventive treatment in pregnancy (IPTp) with dihydroartemisinin-piperaquine (DP) compared to IPTp with sulfadoxine-pyrimethamine (SP), for the prevention of malaria and adverse birth outcomes among pregnant women in sub-Saharan Africa.

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Analysis of how age impacts the effect of primaquine dose on efficacy in patients with Plasmodium vivax and Plasmodium ovale malaria
This Study Group will explore the link between P. vivax recurrence and prior P. falciparum treatment, including increased risk of vivax para...

This Study Group will explore the link between P. vivax recurrence and prior P. falciparum treatment, including increased risk of vivax parasitaemia due to acute malaria infection.

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A pooled analysis assessing the effect of mg/kg dosing strategies on the risk of treatment failure in patients treated with the currently recommended ...

A pooled analysis assessing the effect of mg/kg dosing strategies on the risk of treatment failure in patients treated with the currently recommended dose of artesunate-mefloquine (AS-MQ).

Research groups with relevant data have been contacted with data collection and curation still ongoing. Analysis will start in late 2016 and drafting publication in expected in 2018.

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Development of statistical methods to infer the relationship between the percentage of resistant infections, parasite clearance half-life and the prop...

Development of statistical methods to infer the relationship between the percentage of resistant infections, parasite clearance half-life and the proportion of treated individuals still positive on days one, two and three of treatment

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The overall aim of the IPTp and SP-resistance-associated mutations Study Group is to quantify how parasites with the sextuple mutant pfdhps and pfdhfr...

The overall aim of the IPTp and SP-resistance-associated mutations Study Group is to quantify how parasites with the sextuple mutant pfdhps and pfdhfr haplotype* modify the effect of IPTp on maternal and infant outcomes.

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children singing in a class at a public preschool
Characterising the population pharmacokinetic properties of ivermectin in children and adults to inform optimal dosing of ivermectin
Assessing the efficacy of a range of antimalarials used for the treatment of P. falciparum malaria in all trimesters of pregnancy in Africa ...

Assessing the efficacy of a range of antimalarials used for the treatment of P. falciparum malaria in all trimesters of pregnancy in Africa and Asia

The MiP Treatment Efficacy Study Group was formed in July 2016, with a call to interested researchers with relevant data sets.

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Pooled analyses of the efficacy and safety of single low-dose primaquine to interrupt P. falciparum malaria transmission.Data collection has closed an...

Pooled analyses of the efficacy and safety of single low-dose primaquine to interrupt P. falciparum malaria transmission.

Data collection has closed and curation is ongoing. Analysis and draft publications are planned for circulation to the Group by the June of 2017.

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mothers and babies
The paediatric single low-dose (SLD) primaquine efficacy study group aims to assess and compare the efficacy of SLD primaquine for transmission blocki...

The paediatric single low-dose (SLD) primaquine efficacy study group aims to assess and compare the efficacy of SLD primaquine for transmission blocking of Plasmodium falciparum in young children (under 5 years of age) with that in older children and adults

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The Subpatent Malaria and Pregnancy Outcome Study Group aims to explore the relationship between subpatent Plasmodium falciparum malaria inf...

The Subpatent Malaria and Pregnancy Outcome Study Group aims to explore the relationship between subpatent Plasmodium falciparum malaria infection and pregnancy outcome

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Woman holding baby
Exploring the impact of malaria during pregnancy on infant anaemia, malaria, morbidity and growth – an individual participant meta-analysis. 
This is an extension of a planned dihydroartemisinin-piperaquine (DP) Safety Study Group, which aims to consider the effect of HIV disease and co-admi...

This is an extension of a planned dihydroartemisinin-piperaquine (DP) Safety Study Group, which aims to consider the effect of HIV disease and co-administration of widely-used antiretroviral (ARVs) on the safety of DP. Due to a lack of available DP studies, the individual patient data (IPD) meta-analysis will have greater public health value when these results were compared to other ACTs.

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The sulphadoxine-pyrimethamine (SP) resistance Data Access Group’s aim is to provide maps and open access to the most recent data on molecular markers...

The sulphadoxine-pyrimethamine (SP) resistance Data Access Group’s aim is to provide maps and open access to the most recent data on molecular markers of SP resistance to help policy makers make informed decisions with regard to use of SP for intermittent preventive treatment of malaria in pregnancy (IPTp) or seasonal malaria chemoprevention (SMC).

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woman with child in Sierra Leone
The Study Group was formed in January 2024 to update and expand the WWARN work of the K13 Genotype-Phenotype Study Group, which was published in BMC M...

The Study Group was formed in January 2024 to update and expand the WWARN work of the K13 Genotype-Phenotype Study Group, which was published in BMC Medicine.

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Analysis of the effect of primaquine dose on tolerability and Plasmodium vivax recurrence. 
Patients in medical centre
The Plasmodium vivax fever study group aims to estimate parasitaemia thresholds for febrile patients who present for treatment and determine the ...

The Plasmodium vivax fever study group aims to estimate parasitaemia thresholds for febrile patients who present for treatment and determine the pyrogenic density of vivax parasitaemia in recurrent infections.

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An analysis of pooled individual patient data to determine the effect of antiretroviral (ARV) drug-drug interactions and HIV disease on lumefantr...

An analysis of pooled individual patient data to determine the effect of antiretroviral (ARV) drug-drug interactions and HIV disease on lumefantrine pharmacokinetics (and pharmacodynamics).

This study group has just opened for data collection. If you have any data you would like to share, or if you would like to participate in the project, please contact pharmacology@wwarn.org.

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The First Trimester Safety of ACTs Study Group’s aim is to establish the evidence-base and safety profile to inform decision-making on the use of arte...

The First Trimester Safety of ACTs Study Group’s aim is to establish the evidence-base and safety profile to inform decision-making on the use of artemisinin combination therapies in the first trimester of pregnancy.

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