title: [Air pollution and respiratory illness in children aged less than 5 years-old in Bogotá, 2007].
abstract: OBJECTIVE
  Determining the relationship between indoor and outdoor air pollution caused by particulate matter PM10 and respiratory symptoms in children aged younger than 5 years-old in three locations in Bogota.
  
  
  METHODS
  This was a cohort study, involving 315 children in kindergartens located in the area of greatest exposure to PM10, and 304 in kindergartens located in an area of less exposure. The cohort was followed-up for 19 weeks considering respiratory symptoms. Particulate matter was intramurally and extramurally measured in the kindergartens. Prevalence and association between variables were determined.
  
  
  RESULTS
  There was a difference regarding average intramural PM between higher and lower exposure (85.6 ug/m³cf 61.8 g/m³; p<0.05); 74.3 % of the children had suffered wheezing during the last year, difference between greater and lesser exposure being 79.6 % cf 69.0 % (p<0.05). Wheezing and coughing were associated with greater exposure to PM10 (RR 1.39 and 1.30). Factors associated with respiratory symptoms concerned passive smoking, having a history of low birth weight, a history of wheezing, a child's kindergarten or home being within 100 meters of (industrial) chimneys, high traffic flow routes, roads in disrepair and bed-sharing.
  
  
  CONCLUSIONS
  A child aged less than 5 years-old exposed to PM10 had a 1.7 times higher risk of truancy due to acute respiratory illness; a decrease in PM10 reduced such truancy by 41.1 %.
authors.affiliation: Universidad de los Andes, Bogotá, Colombia, luihern@uniandes.edu.co.
authors.forename: Luis J
authors.initials: LJ
authors.lastname: Hernández-Flórez
authors.affiliation: Ministerio de Salud y Protección Social, Bogotá, Colombia.
authors.forename: Gustavo
authors.initials: G
authors.lastname: Aristizabal-Duque
authors.affiliation: Ministerio de Salud y Protección Social, Bogotá, Colombia.
authors.forename: Leonardo
authors.initials: L
authors.lastname: Quiroz
authors.affiliation: Secretaría Distrital de Salud, Bogotá, Colombia, ekmedina@saludcapital.gov.co.
authors.forename: Katalina
authors.initials: K
authors.lastname: Medina
authors.affiliation: Hospital Pablo VI Bosa, Bogotá, Colombia.
authors.forename: Natalia
authors.initials: N
authors.lastname: Rodríguez-Moreno
authors.affiliation: Secretaría Distrital de Salud, Bogotá, Colombia.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Sarmiento
authors.affiliation: Hospital Vista Hermosa, Bogotá, Colombia, sdosoriog@unal.edu.co.
authors.forename: Samuel D
authors.initials: SD
authors.lastname: Osorio-García
mesh_terms: D000397:Air Pollution / Q000009:adverse effects*; D002675:Child, Preschool; D015331:Cohort Studies; D003105:Colombia; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D052638:Particulate Matter / Q000009:adverse effects* / Q000032:analysis; D012140:Respiratory Tract Diseases / Q000209:etiology*; D014504:Urban Health
chemical_list: D052638:Particulate Matter