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Children's cognitive ability can be affected by mother's exposure to urban air pollutants
Date:4/20/2010

April 20, 2010 -- A study by the Columbia Center for Children's Environmental Health (CCCEH) carried out in Krakow, Poland has found that prenatal exposure to pollutants can adversely affect children's cognitive development at age 5, confirming previous findings in a New York City (NYC) study.

Researchers report that children exposed to high levels of polycyclic aromatic hydrocarbons (PAHs) in Krakow had a significant reduction in scores on a standardized test of reasoning ability and intelligence at age 5. The study findings are published today online in Environmental Health Perspectives.

PAHs are released into the air from the burning of fossil fuels for transportation, heating, energy production, and from other combustion sources.

"The effect on intelligence was comparable to that seen in NYC children exposed prenatally to the same air pollutants," noted Frederica Perera, professor of Environmental Health Sciences and director of the CCCEH at the Mailman School of Public Health, and senior author. "This finding is of concern because IQ is an important predictor of future academic performance, and PAHs are widespread in urban environments and throughout the world."

"These results contribute to the cumulative body of published evidence linking ambient air pollution levels and adverse health effects in children and are clearly relevant to public health policy," says Susan Edwards, study lead author.

The study included a cohort of 214 children who were born to healthy, non-smoking Caucasian women in Krakow, Poland between 2001 and 2006. During pregnancy, the mothers completed a questionnaire, wore small backpack personal air monitors to estimate their babies' PAH exposure, and provided a blood sample and/or a cord blood sample at the time of delivery. The children were followed through the age of 5 when they were tested using the Raven Coloured Progressive Matrices (RCPM) Test of reasoning ability and in
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Contact: Stephanie Berger
sb2247@columbia.edu
212-305-4372
Columbia University's Mailman School of Public Health
Source:Eurekalert

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