title: [Self-reported cases of influenza among Spanish healthcare workers during the 2009 influenza A(H1N1) pandemic].
abstract: OBJECTIVE
  To describe the prevalence of influenza-like syndrome in winter 2009 and the factors associated with its occurrence.
  
  
  METHODS
  A cross-sectional study was carried out in 18 hospitals in Spain. Volunteers completed a health questionnaire in which they reported the occurrence of influenza-like syndrome and vaccination and demographic status.
  
  
  RESULTS
  A total of 1,289 healthcare workers participated. Of these, 72 (5.6%) reported influenza in their family, 195 (15.1%) had been vaccinated against the A/California/7/2009/H1N1 virus and 75 (5.8%, 95%CI: 4.5-7.1%) had been diagnosed with influenza like-syndrome. There were differences among regions. In logistic regression analysis, the following factors were associated with a higher prevalence of influenza-like syndrome: working in Madrid (OR=8.31, 95%CI: 1.05-65.39), the occurrence of cases of influenza in the family (OR=2.84, 95%CI: 1.41-5.73) and not having been vaccinated against influenza A (H1N1) (OR=2.68, 95% CI: 1.05-6.82).
  
  
  CONCLUSIONS
  Differences in the prevalence of influenza-like syndrome were due to the occurrence of familiar cases and region. Vaccination against influenza A (H1N1) was associated with a lower prevalence of the disease.
authors.affiliation: Unidad de Medicina Interna, Hospital Costa del Sol, Marbella, Málaga, España. julianos@hcs.es
authors.forename: Julián
authors.initials: J
authors.lastname: Olalla
authors.forename: Fernando
authors.initials: F
authors.lastname: de Ory
authors.forename: Inmaculada
authors.initials: I
authors.lastname: Casas
authors.forename: Javier
authors.initials: J
authors.lastname: García-Alegría
authors.forename: Francisco
authors.initials: F
authors.lastname: Rivas-Ruiz
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D005260:Female; D006282:Health Personnel; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000175:diagnosis* / Q000453:epidemiology*; D008297:Male; D058873:Pandemics; D057566:Self Report; D013030:Spain / Q000453:epidemiology; D014611:Vaccination