title: [Indoor air pollution by fine particulate matter in the homes of newborns].
abstract: BACKGROUND
  Air pollution by particulate matter (PM) is a major public health problem. In Chile, the study has focused on outdoor air and PM10, rather than indoor air and PM2.5. Because newborns and infants spend most of their time at home, it is necessary to evaluate the exposure to indoor air pollution in this susceptible population.
  
  
  OBJECTIVE
  To determine concentration of PM2.5in the homes of newborns and identify the emission sources of the pollutants.
  
  
  METHODS
  The PM2.5concentration ([PM2.5]) was collected over a 24hour period in 207 households. Baseline sociodemographic information and environmental factors (heating, ventilation, smoking and house cleaning), were collected.
  
  
  RESULTS
  The median [PM2.5] was 107.5μg/m3. Family history of asthma was associated with lower [PM2.5] (P=.0495). Homes without heating showed a lower median [PM2.5], 58.6μg/m3, while those using firewood, kerosene, and electricity ranged between 112.5 and 114.9, and coal users' homes reached 162.9μg/m3. Wood using homes had significant differences (P=.0164) in median [PM2.5] whether the stove had complete combustion (98.2μg/m3) vs. incomplete (112.6μg/m3), or a salamander stove (140.6μg/m3). Cigarette smoking was reported in 8.7% of the households, but was not associated with the [PM2.5]. Ventilation was associated with a higher median [PM2.5] (120.6 vs. 99.1μg/m3, P=.0039).
  
  
  CONCLUSIONS
  We found homes with high [PM2.5]. Residential wood consumption was almost universal, and it is associated with the [PM2.5]. Natural ventilation increased MP2.5, probably due to infiltration from outside.
authors.affiliation: Oficina de Salud Basada en Evidencia (OSBE), Facultad de Medicina, Universidad Austral de Chile, Valdivia, Chile. Electronic address: rbarria@uach.cl.
authors.forename: René Mauricio
authors.initials: RM
authors.lastname: Barría
authors.affiliation: Instituto de Pediatría, Facultad de Medicina, Universidad Austral de Chile, Valdivia, Chile.
authors.forename: Mario
authors.initials: M
authors.lastname: Calvo
authors.affiliation: Programa de Epidemiología, Escuela de Salud Pública, Universidad de Chile, Santiago, Chile.
authors.forename: Paulina
authors.initials: P
authors.lastname: Pino
mesh_terms: D000393:Air Pollutants / Q000032:analysis; D016902:Air Pollution, Indoor / Q000032:analysis*; D001249:Asthma / Q000209:etiology; D002677:Chile; D004784:Environmental Monitoring / Q000379:methods*; D005192:Family Health; D006361:Heating / Q000379:methods; D006798:Housing; D006801:Humans; D007231:Infant, Newborn; D052638:Particulate Matter / Q000032:analysis*; D012907:Smoking / Q000453:epidemiology; D014934:Wood
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter
keywords: Contaminación del aire en interior; Indoor air pollution; Infant/newborn; Material particulado; Particulate matter; Recién nacido