title: Effect of socioeconomic status on the association between air pollution and mortality in Bogota, Colombia.
abstract: OBJECTIVE
  To evaluate the modification effect of socioeconomic status (SES) on the association between acute exposure to particulate matter less than 10 microns in aerodynamic diameter (PM10) and mortality in Bogota, Colombia.
  
  
  METHODS
  A time-series ecological study was conducted (1998-2006). The localities of the cities were stratified using principal components analysis, creating three levels of aggregation that allowed for the evaluation of the impact of SES on the relationship between mortality and air pollution.
  
  
  RESULTS
  For all ages, the change in the mortality risk for all causes was 0.76% (95%CI 0.27-1.26) for SES I (low), 0.58% (95%CI 0.16-1.00) for SES II (mid) and -0.29% (95%CI -1.16-0.57) for SES III (high) per 10µg/m³ increment in the daily average of PM10 on day of death.
  
  
  CONCLUSIONS
  The results suggest that SES significantly modifies the effect of environmental exposure to PM10 on mortality from all causes and respiratory causes.
authors.affiliation: Departamento de Salud Pública, Universidad Industrial de Santander, Bucaramanga, Santander, Colombia.
authors.forename: Luis Camilo
authors.initials: LC
authors.lastname: Blanco-Becerra
authors.affiliation: Head, Nutrition and Metabolism section, International Agency for Research on Cancer, Lyon, France, 69372, romieui@iarc.fr.
authors.forename: Víctor
authors.initials: V
authors.lastname: Miranda-Soberanis
authors.affiliation: Head, Nutrition and Metabolism section, International Agency for Research on Cancer, Lyon, France, 69372, romieui@iarc.fr.
authors.forename: Albino
authors.initials: A
authors.lastname: Barraza-Villarreal
authors.affiliation: Rio de Janeiro State University, Brasil.
authors.forename: Washington
authors.initials: W
authors.lastname: Junger
authors.affiliation: Head, Nutrition and Metabolism section, International Agency for Research on Cancer, Lyon, France, 69372, romieui@iarc.fr.
authors.forename: Magali
authors.initials: M
authors.lastname: Hurtado-Díaz
authors.affiliation: Head, Nutrition and Metabolism section, International Agency for Research on Cancer, Lyon, France, 69372, romieui@iarc.fr.
authors.forename: Isabelle
authors.initials: I
authors.lastname: Romieu
mesh_terms: D000328:Adult; D000368:Aged; D000393:Air Pollutants / Q000009:adverse effects; D000397:Air Pollution / Q000009:adverse effects*; D002423:Cause of Death; D003105:Colombia / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008685:Meteorological Concepts; D008875:Middle Aged; D009026:Mortality; D010316:Particle Size; D052638:Particulate Matter / Q000009:adverse effects; D012140:Respiratory Tract Diseases / Q000401:mortality; D012189:Retrospective Studies; D012923:Social Class; D013997:Time Factors; D014504:Urban Health; D014505:Urban Population / Q000706:statistics & numerical data; D014506:Urban Renewal
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter