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.

Vivax After Falciparum Study Group

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.

Antimalarial–Antiretroviral Analyses

Sub-study groups include the Artemether-Lumefantrine / ARV PK Study Group and the ACT-ARV Safety Study Group.

ACT Malaria and Malnutrition Study Group

A pooled analysis that assessed the effect of various nutritional indicators in treatment outcome in children aged 6-59 months treated with artemisinin based combination therapies for uncomplicated P. falciparum malaria.
This group has published a first manuscript: Complex interactions between malaria and malnutrition: a systematic literature review. Das D et al. BMC Medicine. 2018 Oct 29;16(1):186. Read this news article summarising the results.

Low-dose Primaquine Efficacy and Safety Study Groups

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.

Molecular Markers of Resistance in West Africa Study Group

This Study Group aims to bring together and explore the latest evidence on the prevalence of molecular markers associated with antimalarial drug resistance in West African Countries.

ACT-ARV Haematology Study Group

This is an extension of the WWARN Haemoglobin-Haematocrit Relationship in Malaria Study Group and the Antimalarial–Antiretroviral Analyses Study Group. These groups aimed to consider the effect of HIV disease and co-administration of widely-used antiretroviral drugs (ARVs) on artemisinin-based combination therapies (ACTs).  

Artemether-Lumefantrine / ARV PK Study Group

A meta-analysis of individual patient data (IPD) to determine the effect of antiretroviral (ARV) drug-drug interactions and HIV disease on artemether and lumefantrine pharmacokinetics (PK). The analysis aims to contribute evidence needed to inform recommendations on the use and optimal dosing of artemether-lumefantrine (AL) in HIV-infected patients.

Clinical Trials Methodology Study Group for P. falciparum

This Study Group is exploring key study design and analytical factors which affects derived clinical efficacy of antimalarials. 
Statistical analyses have commenced and preliminary results of ongoing analyses will be shared at EDCTP Forum 2016 (Lusaka, Zambia) and ASTMH 2016 (Atlanta, USA). Publications are expected in 2018.

AS-AQ Post-Treatment Prophylaxis Study Group

Modelling the protective effect of Artesunate-Amodiaquine (AS-AQ)
A pooled analysis to assess the post-treatment prophylactic effect of artesunate-amodiaquine (AS-AQ). The group is quantifying the duration of post-treatment prophylaxis mediated by AS-AQ and how it depends on host factors such as .
The Study Group closed in January 2014. The AS-AQ Post-Treatment Prophylaxis Study Group manuscript is under review at BMC Medicine. 

Piperaquine (Cardiac) Safety Study Group

The Piperaquine Safety Study Group’s aim is to establish the evidence-base and safety profile to inform decision-making on the use and optimal dosing of dihydroartemisinin-piperaquine in all key target populations.
The study group call for contributors opened in June 2016 with a first scoping meeting held in July. Data collection is planned to close by end of 2016, with analysis due in 2018-2019.