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Sociodemographic Factors and Clinical Conditions Associated to Hospitalization in Influenza A (H1N1) 2009 Virus Infected Patients in Spain, 2009–2010

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Sociodemographic Factors and Clinical Conditions Associated to Hospitalization in Influenza A (H1N1) 2009 Virus Infected Patients in Spain, 2009–2010

dc.contributor.author	González Candelas, Fernando	es_ES
dc.contributor.author	Astray, Jenaro	es_ES
dc.contributor.author	Alonso, Jordi	es_ES
dc.contributor.author	Castro, Ady	es_ES
dc.contributor.author	Cantón, Rafael	es_ES
dc.contributor.author	Galán, Juan Carlos	es_ES
dc.contributor.author	Garin, Olatz	es_ES
dc.contributor.author	Sáez, Marc	es_ES
dc.contributor.author	Soldevila, Nuria	es_ES
dc.contributor.author	Baricot, Maretva	es_ES
dc.contributor.author	Castilla, Jesús	es_ES
dc.contributor.author	Godoy, Pere	es_ES
dc.contributor.author	Delgado-Rodríguez, Miguel	es_ES
dc.contributor.author	Martín, Vicente	es_ES
dc.contributor.author	Mayoral, José María	es_ES
dc.contributor.author	Pumarola, Tomás	es_ES
dc.contributor.author	Quintana, José María	es_ES
dc.contributor.author	Tamames, Sonia	es_ES
dc.contributor.author	Domínguez, Ángela	es_ES
dc.date.accessioned	2015-06-19T10:19:53Z
dc.date.available	2015-06-19T10:19:53Z
dc.date.issued	2012	es_ES
dc.identifier.citation	PLoS ONE Vol. 7 Issue 3:	es_ES
dc.identifier.uri	http://hdl.handle.net/10550/44556
dc.description.abstract	The emergence and pandemic spread of a new strain of influenza A (H1N1) virus in 2009 resulted in a serious alarm in clinical and public health services all over the world. One distinguishing feature of this new influenza pandemic was the different profile of hospitalized patients compared to those from traditional seasonal influenza infections. Our goal was to analyze sociodemographic and clinical factors associated to hospitalization following infection by influenza A(H1N1) virus. We report the results of a Spanish nationwide study with laboratory confirmed infection by the new pandemic virus in a case-control design based on hospitalized patients. The main risk factors for hospitalization of influenza A (H1N1) 2009 were determined to be obesity (BMI≥40, with an odds-ratio [OR] 14.27), hematological neoplasia (OR 10.71), chronic heart disease, COPD (OR 5.16) and neurological disease, among the clinical conditions, whereas low education level and some ethnic backgrounds (Gypsies and Amerinds) were the sociodemographic variables found associated to hospitalization. The presence of any clinical condition of moderate risk almost triples the risk of hospitalization (OR 2.88) and high risk conditions raise this value markedly (OR 6.43). The risk of hospitalization increased proportionally when for two (OR 2.08) or for three or more (OR 4.86) risk factors were simultaneously present in the same patient. These findings should be considered when a new influenza virus appears in the human population.	es_ES
dc.title	Sociodemographic Factors and Clinical Conditions Associated to Hospitalization in Influenza A (H1N1) 2009 Virus Infected Patients in Spain, 2009–2010	es_ES
dc.type	journal article	es_ES
dc.identifier.doi	10.1371/journal.pone.0033139	es_ES
dc.identifier.idgrec	084748	es_ES