Figure 1.

This figure exposes three different trajectories of lung function. Trajectory 1 () shows a group of healthy individuals with no history of insults during childhood nor through all of them life, who had a normal maximal lung function age of 25 and had a normal decline in lung function. Trajectory 2 () shows a group of women who had history of exposure to biomass smoke both in the prenatal and childhood phases, with adverse event during childhood, who had: (a) a reduced maximal lung function (around 80% of predicted) and showing a slow decline after the plateau but with similar trajectory as a normal group. Trajectory 3 () shows the cohort of individual who became smokers at the adolescence, they shape a similar curve as healthy individuals reaching a normal maximal lung function. However, after plateau an accelerated decline is observed.