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Sociodemographic factors and clinical conditions associated to hospitalization in influenza A (H1N1) 2009 virus infected patients in Spain, 2009-2010.

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... Full description

Journal Title: PloS one 2012, Vol.7(3), p.e33139
Main Author: González-Candelas, Fernando
Other Authors: Astray, Jenaro , Alonso, Jordi , Castro, Ady , Cantón, Rafael , Galán, Juan Carlos , Garin, Olatz , Sáez, Marc , Soldevila, Nuria , Baricot, Maretva , Castilla, Jesús , Godoy, Pere , Delgado-Rodríguez, Miguel , Martín, Vicente , Mayoral, José María , Pumarola, Tomás , Quintana, José María , Tamames, Sonia , Domínguez, Angela , González-Candelas, Fernando
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1932-6203 ; DOI: 10.1371/journal.pone.0033139
Link: http://search.proquest.com/docview/927989481/?pq-origsite=primo
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title: Sociodemographic factors and clinical conditions associated to hospitalization in influenza A (H1N1) 2009 virus infected patients in Spain, 2009-2010.
format: Article
creator:
  • González-Candelas, Fernando
  • Astray, Jenaro
  • Alonso, Jordi
  • Castro, Ady
  • Cantón, Rafael
  • Galán, Juan Carlos
  • Garin, Olatz
  • Sáez, Marc
  • Soldevila, Nuria
  • Baricot, Maretva
  • Castilla, Jesús
  • Godoy, Pere
  • Delgado-Rodríguez, Miguel
  • Martín, Vicente
  • Mayoral, José María
  • Pumarola, Tomás
  • Quintana, José María
  • Tamames, Sonia
  • Domínguez, Angela
  • González-Candelas, Fernando
subjects:
  • Adolescent–Isolation & Purification
  • Adult–Diagnosis
  • Aged–Epidemiology
  • Aged, 80 and Over–Epidemiology
  • Case-Control Studies–Ethnology
  • Child–Ethnology
  • Child, Preschool–Ethnology
  • Female–Ethnology
  • Hospitalization–Ethnology
  • Humans–Ethnology
  • Infant–Ethnology
  • Infant, Newborn–Ethnology
  • Influenza A Virus, H1n1 Subtype–Ethnology
  • Influenza, Human–Ethnology
  • Male–Ethnology
  • Middle Aged–Ethnology
  • Pandemics–Ethnology
  • Risk Factors–Ethnology
  • Spain–Ethnology
  • Young Adult–Ethnology
ispartof: PloS one, 2012, Vol.7(3), p.e33139
description: 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 greater than or equal to 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.
language: eng
source:
identifier: E-ISSN: 1932-6203 ; DOI: 10.1371/journal.pone.0033139
fulltext: fulltext
issn:
  • 19326203
  • 1932-6203
url: Link


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titleSociodemographic factors and clinical conditions associated to hospitalization in influenza A (H1N1) 2009 virus infected patients in Spain, 2009-2010.
creatorGonzález-Candelas, Fernando ; Astray, Jenaro ; Alonso, Jordi ; Castro, Ady ; Cantón, Rafael ; Galán, Juan Carlos ; Garin, Olatz ; Sáez, Marc ; Soldevila, Nuria ; Baricot, Maretva ; Castilla, Jesús ; Godoy, Pere ; Delgado-Rodríguez, Miguel ; Martín, Vicente ; Mayoral, José María ; Pumarola, Tomás ; Quintana, José María ; Tamames, Sonia ; Domínguez, Angela ; González-Candelas, Fernando
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ispartofPloS one, 2012, Vol.7(3), p.e33139
identifierE-ISSN: 1932-6203 ; DOI: 10.1371/journal.pone.0033139
subjectAdolescent–Isolation & Purification ; Adult–Diagnosis ; Aged–Epidemiology ; Aged, 80 and Over–Epidemiology ; Case-Control Studies–Ethnology ; Child–Ethnology ; Child, Preschool–Ethnology ; Female–Ethnology ; Hospitalization–Ethnology ; Humans–Ethnology ; Infant–Ethnology ; Infant, Newborn–Ethnology ; Influenza A Virus, H1n1 Subtype–Ethnology ; Influenza, Human–Ethnology ; Male–Ethnology ; Middle Aged–Ethnology ; Pandemics–Ethnology ; Risk Factors–Ethnology ; Spain–Ethnology ; Young Adult–Ethnology
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descriptionThe 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 greater than or equal to 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.
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13Martín, Vicente
14Mayoral, José María
15Pumarola, Tomás
16Quintana, José María
17Tamames, Sonia
18Domínguez, Angela
titleSociodemographic factors and clinical conditions associated to hospitalization in influenza A (H1N1) 2009 virus infected patients in Spain, 2009-2010.
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19López, R
20Maldonado, J R
21Mayoral, J M
22Morillo, Á
23Navarro, J M
24Pérez, M
25Oña, S
26Pérez, M J
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28Zarzuela, M
29Blanquer, J
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31Morales, M
32Carriedo, D
33Díez, F
34Fernández, I
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titleSociodemographic factors and clinical conditions associated to hospitalization in influenza A (H1N1) 2009 virus infected patients in Spain, 2009-2010.
authorGonzález-Candelas, Fernando ; Astray, Jenaro ; Alonso, Jordi ; Castro, Ady ; Cantón, Rafael ; Galán, Juan Carlos ; Garin, Olatz ; Sáez, Marc ; Soldevila, Nuria ; Baricot, Maretva ; Castilla, Jesús ; Godoy, Pere ; Delgado-Rodríguez, Miguel ; Martín, Vicente ; Mayoral, José María ; Pumarola, Tomás ; Quintana,...
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28Martínez, B
29Quesada, J P
30Sillero, M
31Carnero, M
32Fernández-Crehuet, J
33Del Diego Salas, J
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atitleSociodemographic factors and clinical conditions associated to hospitalization in influenza A (H1N1) 2009 virus infected patients in Spain, 2009-2010.
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