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Improving projections at the country level: the UNAIDS Estimation and Projection Package 2005
T Brown1, N C Grassly, G Garnett
1tim@hawaii.edu
Sexually Transmitted Infections
|June 1, 2006
Summary
The Estimation and Projection Package (EPP) 2005 offers improved HIV prevalence estimation and projection methods for national programs. This enhanced tool supports accurate global HIV and AIDS estimates.
Area of Science:
- Epidemiology
- Public Health
- Biostatistics
Background:
- UNAIDS developed the Estimation and Projection Package (EPP) for national HIV prevalence estimation and short-term projections.
- EPP serves as direct input for the Spectrum software, which models HIV incidence, deaths, and AIDS impacts.
Purpose of the Study:
- To introduce and detail the methodological improvements in the EPP 2005 version.
- To facilitate accurate national and global HIV/AIDS estimations and projections.
Main Methods:
- EPP 2005 features parallel interfaces for generalized and concentrated epidemics.
- It incorporates maximum likelihood fitting, level fits for surveillance expansion, population turnover adjustments, and user-defined calibration.
- These methods enhance the accuracy and adaptability of HIV prevalence modeling.
Main Results:
- EPP 2005 was applied by numerous national programs for end-of-2005 HIV infection estimates following regional training.
- UNAIDS utilized these national estimates to generate the 2005 global HIV and AIDS estimates.
Conclusions:
- EPP 2005 represents a significant advancement over prior versions.
- It establishes a robust foundation for future enhancements in HIV/AIDS estimation methodologies.
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