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Amazon Forest Fires Between 2001 and 2006 and Birth Weight in Porto Velho

Abstract

Birth weight data (22,012 live-births) from a public hospital in Porto Velho (Amazon) was used in multiple statistical models to assess the effects of forest-fire smoke on human reproductive outcome. Mean birth weights for girls (3,139 g) and boys (3,393 g) were considered statistically different (p-value < 2.2e-16). Among all models analyzed, the means were considered statistically different only when treated as a function of month and year (p-value = 0.0989, girls and 0.0079, boys) . The R 2 statistics indicate that the regression models considered are able to explain 65 % (girls) and 54 % (boys) of the variation of the mean birth weight.

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Acknowledgments

Taiane S. Prass was partially supported by CNPq-Brazil. S.R.C. Lopes was partially supported by CNPq-Brazil, by CAPES-Brazil, by INCT em Matemática and by Pronex Probabilidade e Processos Estocásticos - E-26/170.008/2008 -APQ1.

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Correspondence to Taiane S. Prass.

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Prass, T.S., Lopes, S.R.C., Dórea, J.G. et al. Amazon Forest Fires Between 2001 and 2006 and Birth Weight in Porto Velho. Bull Environ Contam Toxicol 89, 1–7 (2012). https://doi.org/10.1007/s00128-012-0621-z

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Keywords

  • Forest fires
  • Birth weight
  • ANOVA
  • Regression model