Repositório Científico do Instituto Nacional de Saúde >
Departamento de Epidemiologia >
DEP - Artigos em revistas internacionais >
Please use this identifier to cite or link to this item:
|Title: ||Influenza surveillance in Europe: establishing epidemic thresholds by the Moving Epidemic Method|
|Authors: ||Vega, Tomás|
Lozano, Jose Eugenio
Ortiz de Lejarazu, Raul
Determinantes da Saúde e da Doença
|Issue Date: ||16-Aug-2012|
|Publisher: ||Blackwell Publishing Ltd|
|Citation: ||Influenza Other Respi Viruses. 2012 Aug 16. doi: 10.1111/j.1750-2659.2012.00422.x|
|Abstract: ||Background Timely influenza surveillance is important to monitor influenza epidemics.
Objectives (i) To calculate the epidemic threshold for influenza-like illness (ILI) and acute respiratory infections (ARI) in 19 countries, as well as the thresholds for different levels of intensity. (ii) To evaluate the performance of these thresholds.
Methods The moving epidemic method (MEM) has been developed to determine the baseline influenza activity and an epidemic threshold. False alerts, detection lags and timeliness of the detection of epidemics were calculated. The performance was evaluated using a cross-validation procedure.
Results The overall sensitivity of the MEM threshold was 71·8% and the specificity was 95·5%. The median of the timeliness was 1 week (range: 0–4·5).
Conclusions The method produced a robust and specific signal to detect influenza epidemics. The good balance between the sensitivity and specificity of the epidemic threshold to detect seasonal epidemics and avoid false alerts has advantages for public health purposes. This method may serve as standard to define the start of the annual influenza epidemic in countries in Europe.|
|Peer Reviewed: ||yes|
|Publisher version: ||http://onlinelibrary.wiley.com/doi/10.1111/j.1750-2659.2012.00422.x/abstract|
|Appears in Collections:||DEP - Artigos em revistas internacionais|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.