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

## TL;DR

This study investigates the impact of Amazon forest fires between 2001 and 2006 on birth weights in Porto Velho, using statistical models to analyze data from over 22,000 live births.

## Contribution

It provides new evidence linking forest-fire smoke exposure to variations in birth weight in a specific Amazon region.

## Key findings

- Significant difference in mean birth weights between girls and boys.
- Regression models explain over half of the variation in birth weights.
- Birth weights are affected by forest-fire smoke exposure.

## 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.