Abstract
Based on database linkage, the objective of this study was to describe the epidemiological profile of notified cases and deaths from the new viral subtype of influenza during the influenza pandemic. Secondary data were used from the SINAN (Information System for Notifiable Diseases) and SIM (Mortality Information System) for the years 2009 and 2010. Linkage identified 5,973 deaths of cases notified as pandemic influenza. Of these, 2,170 (36.33%) had been classified in the SINAN as confirmed pandemic influenza, 215 (3.6%) as due to other infectious agents, and 3,340 (55.92%) as ruled out. After linkage, some cases in the SINAN database that were closed as death from influenza (n = 658) or death from other causes (n = 847) could not be located in the SIM database. Database linkage can improve the surveillance system and monitoring of morbidity and mortality. We recommend strengthening influenza surveillance in Brazil using linkage of Ministry of Health databases.
Highlights
the objective of this study was to describe the epidemiological profile of notified cases and deaths from the new viral subtype
of influenza during the influenza pandemic. Secondary data were used from the Sistema de Informação de Agravos de Notificação (SINAN)
5,973 deaths of cases notified as pandemic influenza
Summary
Foi desenvolvido um estudo descritivo, utilizando-se dados secundários, nos anos de 2009 e 2010. Os dados utilizados nesta pesquisa foram obtidos a partir das bases nacionais do módulo “influenza pandêmica” do SINAN e das declarações de óbito do Sistema de Informações sobre Mortalidade (SIM), solicitadas à Secretaria de Vigilância em Saúde do Ministério da Saúde, com registros identificados nominalmente. A definição de caso para SRAG por influenza de casos notificados no SINAN foi a utilizada pelo Ministério da Saúde 1,16. Para o cálculo da letalidade, considerou-se, no numerador, o número de registros de óbito por influenza provocada por novo subtipo viral de entre os casos classificados como confirmados que foram notificados no SINAN (n = 2.176), enquanto, no denominador, levou-se em conta o número de casos confirmados notificados no SINAN (n = 53.797). Após o processamento do relacionamento e a revisão manual dos pares, foram identificados 5.973 pares verdadeiros, que formaram um novo banco de dados
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