title: Impact of traffic flow on the asthma prevalence among school children in Lima, Peru.
abstract: OBJECTIVE
  To estimate the impact of traffic flow on the prevalence of asthma among school children of 6 to 7 and 13 to 14-years of age.
  
  
  METHODS
  A cross-sectional study consisting of 5,917 children selected in schools of the Cone Norte of Lima, Peru.
  
  
  RESULTS
  For the 6- to 7-year age group the prevalence of medical diagnosis of asthma according to the traffic flow index was 8.6% (CI: 6.8-10.8), 10.3% (CI: 8.4-12.4), and 15.3% (CI:13.3-17.5) at low, medium and high, respectively, and for the 13- to 14-year age group, 11.9% (CI: 9.4-14.6), 13.3% (CI: 11.6-15.2), and 17.1% (CI: 14.7-19.6).
  
  
  CONCLUSIONS
  For both groups, the prevalence of asthma was significantly related to traffic flow density.
authors: Departamento de Estadística, Demografía, Humanidades y Ciencias Sociales, Universidad Peruana Cayetano Heredia, Lima, Perú.
authors: Luz
authors: L
authors: Carbajal-Arroyo
authors: Albino
authors: A
authors: Barraza-Villarreal
authors: Rubén
authors: R
authors: Durand-Pardo
authors: Hortensia
authors: H
authors: Moreno-Macías
authors: Rocío
authors: R
authors: Espinoza-Laín
authors: Pascual
authors: P
authors: Chiarella-Ortigosa
authors: Isabelle
authors: I
authors: Romieu
mesh_terms: D000293:Adolescent; D000397:Air Pollution; D001249:Asthma / Q000453:epidemiology* / Q000503:physiopathology; D002648:Child; D003430:Cross-Sectional Studies; D004781:Environmental Exposure; D005260:Female; D006801:Humans; D008297:Male; D010568:Peru / Q000453:epidemiology; D015995:Prevalence; D012111:Residence Characteristics; D012135:Respiratory Sounds; D012574:Schools; D014505:Urban Population; D001335:Vehicle Emissions
chemical_list: D001335:Vehicle Emissions