title: [Daily Surveillance of Pandemic Influenza (H1N1) 2009 by primary care electronic clinical records in the Madrid region].
abstract: BACKGROUND
  Pandemic influenza (H1N1) 2009 led to implementation in the Madrid Region of new strategies of epidemiology surveillance in order to give response to the need of immediacy and exhaustiveness.
  
  
  METHODS
  Descriptive cross-sectional study between May 1th 2009 and May 22th 2010. All disease episodes registered and reported as influenza disease were collected every day from electronic clinical records in primary care of Madrid Regional Public Health System. Data were analyzed by date, age, sex and health zoning, disaggregating into health professionals.
  
  
  RESULTS
  165.492 influenza episodes were registered (53,8% in women). The main number of cases was in the 25-49 years group (70.691), and the 5-14 years group reached the maximum weekly incidence rate (1.618,65/100.000 in the week 43). The highest weekly total incidence rate was 458,47/100.000 (week 44). Pediatricians reached the maximum of cases visited and of cumulated rates (12 pediatricians visited more than 20% of their total assigned population).
  
  
  CONCLUSIONS
  Surveillance of pandemic influenza (H1N1) 2009 by automatic daily data collection from electronic clinical records in primary care has meant a specially useful information source for monitoring the development of pandemic influenza and for the strategic decision making.
authors.affiliation: Subdirección de Promoción de la Salud y Prevención, Dirección General de Atención Primaria, Consejería de Sanidad, Comunidad de Madrid, Madrid, Spain.
authors.forename: María D
authors.initials: MD
authors.lastname: Esteban-Vasallo
authors.forename: Maria Felicitas
authors.initials: MF
authors.lastname: Domínguez-Berjón
authors.forename: Ricard
authors.initials: R
authors.lastname: Gènova Maleras
authors.forename: Luis M
authors.initials: LM
authors.lastname: Blanco Ancos
authors.forename: Jenaro
authors.initials: J
authors.lastname: Astray Mochales
authors.forename: Maria Ángeles
authors.initials: MÁ
authors.lastname: Lópaz Pérez
authors.forename: José Francisco
authors.initials: JF
authors.lastname: Barbas Del Buey
authors.forename: Andrés
authors.initials: A
authors.lastname: Aragón Peña
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D057286:Electronic Health Records; D005260:Female; D006801:Humans; D007223:Infant; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control*; D008297:Male; D008875:Middle Aged; D058873:Pandemics; D011159:Population Surveillance / Q000379:methods*; D011320:Primary Health Care; D013030:Spain / Q000453:epidemiology; D013997:Time Factors; D014504:Urban Health; D055815:Young Adult