SciELO - Scientific Electronic Library Online

vol.85 issue1Attitudes and Preventive Behaviours Adopted During the (H1N1) 2009 Influenza Virus Epidemic in SpainComparison in Andalusia and Catalonia of Sickness Absence for Influenza (H1N1) 2009 author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google


Revista Española de Salud Pública

On-line version ISSN 2173-9110Print version ISSN 1135-5727


GODOY, Pere  and  GRUPO DE TRABAJO DE VIGILANCIA Y CONTROL DE LA GRIPE PANDEMICA et al. Characteristics of Cases Hospitalized for Severe Pandemic (H1N1) 2009 in Catalonia. Rev. Esp. Salud Publica [online]. 2011, vol.85, n.1, pp.81-87. ISSN 2173-9110.

Background. Influenza pandemics may cause more severe cases. The objective was to determine the characteristics of hospitalized severe cases of pandemic influenza in Catalonia and to study risk factors for admission to intensive care unit (ICU). Methods: A prospective epidemiologic study of new cases of pandemic influenza hospitalized by their severity between June 2009 and May 2010. Hospitals were asked to declare laboratory confirmed pandemic influenza cases that met the case specific case definition for severe case. A standardized epidemiological survey was conducted to collect information on demographics, clinical characteristics, risk factors, treatment and outcome. Differences between the cases in ICU compared to other severe cases were studied with the odds ratio (OR), which were adjusted using a logistic regression model. Results: We detected total of 773 pandemic influenza (H1N1) 2009 severe cases; 465 (60.2%) of them had at least one risk factor and the most prevalent were: pregnancy 19 (13%), asthma 87 (12%), chronic obstructive pulmonary disease 87 (11.4%) and heart disease 80 (10.5%). Required admission to ICU 293 patients (37.9%). Factors associated with ICU admission were obesity BMI>40 (adjusted OR = 2.5, 95% CI 1.4-4.5) and chronic liver disease (adjusted OR = 2.3, 95% CI 1.1-4.8). Conclusions: This study confirms the high prevalence of pregnancy, chronic respiratory diseases, diabetes and obesity among pandemic influenza severe cases. Obesity acts as a risk factor for ICU admission and should therefore be considered as an indicator for influenza vaccination.

Keywords : Human influenza; Epidemiological surveillance; Pandemic; Risk Factors; Lethality.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License