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Past research in both trachoma and other neglected tropical diseases (NTDs), such as soil-transmitted helminthiases and lymphatic filariasis, has shown that MBG requires fewer clusters compared to the standard survey design. This is because MBG ta...
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No, surveys will still be required in most cases as some data are always needed to run the models. The more data that are available, the better the predictive ability of the model.
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Setting the PBT threshold is a decision that is both political and technical, as it is a question about how much uncertainty the global trachoma community is willing to tolerate. A special advisory group (SAG) is in the process of being created, l...
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The PBT is the probability of being below the elimination threshold: a prevalence of less than 5% for trachomatous inflammation—follicular (TF), or less than 0.2% for trachomatous trichiasis (TT). As PBT values get closer to 100% or 0%, we c...
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MBG uses a model-based approach, whereas the current Tropical Data method uses a design-based approach, to estimate trachoma prevalence. The current design-based approach uses prevalence data and the population census from a single evaluation unit...
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Geostatistics is a short-hand for the collection of statistical methods relevant to the analysis of geolocated data. The aim is to study geographical variation throughout a region of interest by using data that are limited to observations from a f...
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Last Updated: 28/02/2024
in Geostatistical approaches Incorporating Model-based Geostatistics into the Tropical Data service Trachoma is targeted for elimination by 2030. To achieve this, health ministries must demonstrate that active trachoma prevalence is below 5%, trachomatous trichiasis (TT) is ...
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Last Updated: 28/02/2024
in Geostatistical approaches Recording of the Tropical Data geostatistics webinar, hosted online on the 30th August 2023. This webinar was designed to give an overview on the incorporation of model-based geostatistics (MBG) into the Tropical Data service. Speakers...
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Last Updated: 31/01/2024
in Serology & Infection testing Below you can access three articles which exemplify some of the methods used to collect and process samples as part of 'plus' surveys. Click on picture to download. ...
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Last Updated: 18/01/2024
in Serology & Infection testing Click here for our Introduction to adaptations being made to Tropical Data to incorporate serology and infection data collection ...