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BMC Medical Informatics and Decision Making
Published in: BMC Medical Informatics and Decision Making 1/2007

Open Access 01-12-2007 | Software

Online detection and quantification of epidemics

Authors: Camille Pelat, Pierre-Yves Boëlle, Benjamin J Cowling, Fabrice Carrat, Antoine Flahault, Séverine Ansart, Alain-Jacques Valleron

Published in: BMC Medical Informatics and Decision Making | Issue 1/2007

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Abstract

Background

Time series data are increasingly available in health care, especially for the purpose of disease surveillance. The analysis of such data has long used periodic regression models to detect outbreaks and estimate epidemic burdens. However, implementation of the method may be difficult due to lack of statistical expertise. No dedicated tool is available to perform and guide analyses.

Results

We developed an online computer application allowing analysis of epidemiologic time series. The system is available online at http://​www.​u707.​jussieu.​fr/​periodic_​regression/​. The data is assumed to consist of a periodic baseline level and irregularly occurring epidemics. The program allows estimating the periodic baseline level and associated upper forecast limit. The latter defines a threshold for epidemic detection. The burden of an epidemic is defined as the cumulated signal in excess of the baseline estimate. The user is guided through the necessary choices for analysis. We illustrate the usage of the online epidemic analysis tool with two examples: the retrospective detection and quantification of excess pneumonia and influenza (P&I) mortality, and the prospective surveillance of gastrointestinal disease (diarrhoea).

Conclusion

The online application allows easy detection of special events in an epidemiologic time series and quantification of excess mortality/morbidity as a change from baseline. It should be a valuable tool for field and public health practitioners.
Appendix
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Metadata
Title
Online detection and quantification of epidemics
Authors
Camille Pelat
Pierre-Yves Boëlle
Benjamin J Cowling
Fabrice Carrat
Antoine Flahault
Séverine Ansart
Alain-Jacques Valleron
Publication date
01-12-2007
Publisher
BioMed Central
Published in
BMC Medical Informatics and Decision Making / Issue 1/2007
Electronic ISSN: 1472-6947
DOI
https://doi.org/10.1186/1472-6947-7-29

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