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Amazon forest fires between 2001 and 2006 and birth weight in Porto Velho
Taiane S Prass1, Sílvia R C Lopes, José G Dórea
1Institute of Mathematics, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil. taianeprass@gmail.com
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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