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  1. Monitoring mortality as an indicator of influenza in Catalonia, Spain.

    Article - En anglais

    Study objective

    This study aimed to investigate the behaviour oftwo indicators of influenza activity in the area of Barcelona and to evaluate the usefulness ofmodelling them to improve the detection of influenza epidemics.

    Design

    Descriptive time series study using the number of deaths due to all causes registered by funeral services and reported cases of influenza-like illness.

    The study concentrated on five influenza seasons, from week 45 of 1988 to week 44 of 1993.

    The weekly number of deaths and cases of influenza-like illness registered were processed using identification of a time series ARIMA model.

    Setting

    Six large towns in the Barcelona province which have more than 60 000 inhabitants and funeral services in all of them.

    Main results

    For mortality, the proposed model was an autoregressive one of order 2 (ARIMA (2,0,0)) and for morbidity it was one of order 3 (ARIMA (3,0,0)). Finally, the two time series were analysed together to facilitate the detection of possible implications between them.

    The joint study of the two series shows that the mortality series can be modelled separately from the reported morbidity series, but the morbidity series is influenced as much by the number of previous cases of influenza reported as by the previous mortality registered.

    Conclusions

    The model based on general mortality is useful for detecting epidemic activity of influenza. (...)

    Mots-clés Pascal : Grippe, Virose, Infection, Epidémiologie, Indicateur, Série temporelle, Mortalité, Surveillance sanitaire, Homme, Modèle statistique, Variation saisonnière, Morbidité, Espagne, Europe

    Mots-clés Pascal anglais : Influenza, Viral disease, Infection, Epidemiology, Indicator, Time series, Mortality, Sanitary surveillance, Human, Statistical model, Seasonal variation, Morbidity, Spain, Europe

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 96-0318463

    Code Inist : 002B05C02C. Création : 10/04/1997.