Results from a new online resource developed to predict treatment outcomes for settings without access to genotypic resistance tests were presented in a poster at the conference.1
The system was developed by training computer models to predict virological response to therapy using data from approximately 15,000 treatment changes drawn from over 15 countries. The models use CD4, viral load, treatment history and the drugs in the new regimen in making their predictions and can generate predictions of response at selected time points out to 48 weeks for all available combinations or for a selected combination. The system includes the option to select drugs that are available in each country and to exclude drugs that are contraindicated.
The accuracy of the models was assessed with an independent test set of 800 cases. Two further test sets from Romania (n=39) and South Africa (n=56) were also reported together with subset of 57 cases from the 800 test set that had genotypes available.
The models are now available via the RDI's online treatment selection tool HIV-TRePS. Importantly, the resource includes the option to include, with permission, anonymised information on treatment decisions and outcomes to be collected to help further development of the system.2
The resource has been developed by researchers at RDI who were involved in much of the original pioneering work into HIV drug resistance technology and more recently have been developing prediction tools to interpret genotype results using computer-developed neural networks.
Future reports on how this resource is used in practice will be important given the extremely restricted access to resistance testing in most resource-limited countries and that this is unlikely to change in the near future.
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