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Exposure to parental stress increases pollution-related lung damage in children
Date:6/23/2011

Psychosocial stress appears to enhance the lung-damaging effects of traffic-related pollution (TRP) in children, according to new research from the Keck School of Medicine of the University of Southern California (USC) in Los Angeles.

The results will appear online ahead of the print edition of the American Thoracic Society's American Journal of Respiratory and Critical Care Medicine.

"This is the first study demonstrating that growing up in a stressful household was associated with larger traffic pollution-induced lung deficits in healthy children compared to low stress households," said lead researcher Talat Islam, MBBS, assistant professor in the Division of Environmental Health at Keck School of Medicine.

Dr. Islam and colleagues administered a validated stress questionnaire, the Perceived Stress Scale (PSS), to the parents of nearly 1,400 children who participated in the USC Children's Health Study in Southern California. The children, ranging between 10-12 years old, were assessed for lung function and other respiratory health outcomes. Their exposure to traffic-related pollutants (TRP) was assessed by estimating exposure to nitric oxide (NO), nitrogen dioxide (NO2), and total oxides of nitrogen (NOX) at school and at home.

The researchers identified a number of socio-demographic factors associated with stress levels among the participants' parents. Hispanic and Asian parents had relatively higher levels of perceived stress than White parents. Characteristics associated with low socioeconomic levels were also associated with high stress, such as income below $30,000 a year, low parental education, lack of health insurance and lack of an air conditioner in the home. Similarly, exposures to traffic-related pollution varied widely within the study. NOX, for example, ranged from 6 to 108 ppb in different locations.

The researchers did not observe any statistically significant associations between parenta
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Contact: Keely Savoie
ksavoie@thoracic.org
212-315-86220
American Thoracic Society
Source:Eurekalert

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