Figure 2. Changes in Lung Function During the Course of Mild and Moderate Asthma.
Schematic representation of airway function trajectories for children without asthma, with asthma and mild or no airflow limitation, and for children with persistent asthma and airflow limitation. As a group, the latter show impaired airways function growth especially during the preschool years. These deficits extend, albeit in a less evident way, to the school age and, as steeper decline in airway function, to adulthood (Reproduced from Lancet 2013 Oct 19;382(9901):1360–72 with permission).