Pandemic (H1N1) 2009, Southern Brazil | CDC EID / Volume 17, Number 8–August 2011

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Volume 17, Number 8–August 2011
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Risk Factors for Death from Pandemic (H1N1) 2009, Southern Brazil

Renata T.C. Yokota, Comments to Author Lacita M. Skalinski, Cristine N. Igansi, Libia R.O. de Souza, Betine P.M. Iser, Priscilleyne O. Reis, Eliana N.C. Barros, Eduardo M. Macário, Marilina A. Bercini, Tani M.S. Ranieri, and Wildo N. Araújo

Author affiliations: Ministry of Heath, Brasilia, Brazil (R.T.C. Yokota, L.M. Skalinski, C.N. Igansi, L.R.O. de Souza, B.P.M. Iser, P.O. Reis, E.N.C. Barros, E.M. Macário, W.N. Araújo); and Health Secretariat of Rio do Sul State, Porto Alegre, Brazil (M.A. Bercini, T.M.S. Ranieri)

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Abstract
To identify risk factors for death from pandemic (H1N1) 2009, we obtained data for 157 hospitalized patients with confirmed cases of this disease. Multivariate analysis showed that diabetes and class III obesity were associated with death. These findings helped define priority vaccination groups in Brazil.

In May 2009, pandemic (H1N1) 2009 was identified in Brazil (1). In June 2009, the first confirmed death from this disease was reported in southern Brazil. On July 16, 2009, Brazil declared sustained transmission of pandemic (H1N1) 2009, and the case definition for mandatory notification was limited to suspected influenza cases with fever >38°C, cough, and dyspnea or death, i.e., severe acute respiratory infection (1). During July 19, 2009–January 2, 2010, a total of 44,544 pandemic influenza cases were confirmed and 2,051 deaths were reported in Brazil, corresponding to notification and death rates of 23.3 cases and 1.1 deaths per 100,000 population. In southern Brazil, notification and death rates reached 110 cases and 3.0 deaths per 100,000 population, and a 4.6% case-fatality rate was observed among reported patients (2). To identify risk factors for death caused by pandemic (H1N1) 2009, we analyzed data for patients hospitalized with confirmed pandemic (H1N1) 2009 at the beginning of the pandemic in southern Brazil.

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Suggested Citation for this Article

Yokota RTC, Skalinski LM, Igansi CN, de Souza LRO, Iser BPM, Reis PO, et al. Risk factors for death from pandemic (H1N1) 2009, southern Brazil. Emerg Infect Dis [serial on the Internet]. 2011 Aug [date cited]. http://www.cdc.gov/EID/content/17/8/101233.htm

DOI: 10.3201/eid1708.101233

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Renata T.C. Yokota, Programa de Treinamento em Epidemiologia Aplicada aos Serviços do Sistema Único de Saúde, Centro de Informações Estratégicas e Respostas em Vigilância em Saúde, Departamento de Vigilância Epidemiológica, Secretaria de Vigilância em Saúde, Esplanada dos Ministérios, Bloco G, Ed. Sede do Ministério da Saúde, 1º Andar, Sala 137, Brasília DF, Brazil; email: renata.yokota@saude.gov.br