PURPOSE OF THE STUDY.
To determine the effects of decreased air pollution in Southern California over 3 separate calendar periods from 1994 to 1998, 1997 to 2001, and 2007 to 2011.
Children 11 to 15 years of age living in Southern California communities.
There were 2120 children enrolled in 12 Southern California communities, and analysis was done from 5 communities where consistent results were obtained in all 3 cohorts. Linear regression models were used to examine the relationship between declining pollution levels over time and lung function development from 11 to 15 years of age.
Over the 13 years, improvement in 4-year growth in both forced expiratory volume in 1 second and forced vital capacity were associated with concurrent decline in levels of nitrogen dioxide and a particulate matter of aerodynamic size <2.5 microns and also for particles <10 microns. The portion of children with low forced expiratory volume in 1 second (<80% predicted) at 15 years of age declined significantly from 7.9% to 6.3% and then 3.6% across the three periods. There was no difference in females or males and in patients with or without asthma.
Long-term improvement in air quality was associated statistically and clinically with significant positive effect on lung function and lung growth in children.
These data are a major public health statement of the salutary benefits for our efforts to improve air quality. A higher level of lung function in early adulthood decreases the effect of chronic respiratory conditions and also decreases premature death of all causations.
- Copyright © 2015 by the American Academy of Pediatrics