February 16, 2007 -- New York City dwellers who reside in densely populated, pedestrian-friendly areas have significantly lower body mass index levels compared to other New Yorkers, according to a new study by the Mailman School of Public Health. Placing shops, restaurants and public transit near residences may promote walking and independence from private automobiles.

"There are relatively strong associations between built environment and BMI, even in population-dense New York City," said Andrew Rundle, DrPH assistant professor of Epidemiology at the Mailman School and lead author.

The researchers looked at data from 13,102 adults from New York City's five boroughs. Matching information on education, income, height, weight and home address with census data and geographic records, they determined respondents' access to public transit, proximity to commercial goods and services and BMI, a measure of weight in relation to height.

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The study appears in the March/April issue of the American Journal of Health Promotion.

A new study suggests that children who grow up within a third of a mile of a freeway may be sustaining permanent respiratory problems.

Researchers studied developing lung function in 1,445 children living in 12 Southern California communities for eight years, from age 10 to 18. They found that the closer the children lived to a freeway, the more likely they were to experience reduced growth in lung function as measured by the standard tests.

"That living near freeways is a health issue is something we've known about for a long time," said Gennet Paauwe, a spokeswoman for the California Air Resources Board, which financed part of the research. "All of this points to the fact that California's air pollution control program needs to continue with its aggressive reduction in air pollutants. But I think this would translate to any other part of the U.S. where people are living near heavily trafficked roadways."

The findings were published online Friday by the British journal Lancet.

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