title: [The effect of air pollutants on birth weight in medium-sized towns in the state of São Paulo].
abstract: OBJECTIVE
  To investigate the effect of air pollution on birth weight in a medium-sized town in the State of São Paulo, Southeast Brazil.
  
  
  METHODS
  Cross-sectional study using data of live births to mothers residing in São José dos Campos from 2005 to 2009. Data was obtained from the Department of Information and Computing of the Brazilian Unified Health System. Air pollutant data (PM, SO and O) and daily averages of their concentrations were obtained from the Environmental Sanitation & Technology Company. Statistical analysis was performed by linear and logistic regressions using the Excel and STATA v.7 software programs.
  
  
  RESULTS
  Maternal exposure to air pollutants was not associated with low birth weight, with the exception of exposure to SO within the last month of pregnancy (OR=1,25; IC95% 1,00-1,56). Maternal exposure to PM and SO during the last month of pregnancy led to lower weight at birth (0.28 g and 3.15 g, respectively) for each 1mg/m(3) increase in the concentration of these pollutants, but without statistical significance.
  
  
  CONCLUSIONS
  This study failed to identify a statistically significant association between the levels of air pollutants and birth weight, with the exception of exposure to SO within the last month of pregnancy.
authors.affiliation: Universidade de Taubaté (UNITAU), Taubaté, SP, Brasil.
authors.forename: Veridiana de Paula
authors.initials: Vde P
authors.lastname: Santos
authors.affiliation: Universidade de Taubaté (UNITAU), Taubaté, SP, Brasil. Electronic address: apeneluppi@uol.com.br.
authors.forename: Andréa Paula Peneluppi
authors.initials: AP
authors.lastname: de Medeiros
authors.affiliation: Universidade de Taubaté (UNITAU), Taubaté, SP, Brasil.
authors.forename: Thaiza Agostini Córdoba
authors.initials: TA
authors.lastname: de Lima
authors.affiliation: Universidade de Taubaté (UNITAU), Taubaté, SP, Brasil.
authors.forename: Luiz Fernando Costa
authors.initials: LF
authors.lastname: Nascimento
mesh_terms: D000393:Air Pollutants / Q000494:pharmacology*; D000397:Air Pollution / Q000009:adverse effects*; D001724:Birth Weight / Q000187:drug effects*; D001938:Brazil; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D018811:Maternal Exposure; D014504:Urban Health
chemical_list: D000393:Air Pollutants
keywords: Air pollution; Baixo peso ao nascer; Linear regression; Logistic regression; Low birthweight; Poluição do ar; Regressão linear; Regressão logística