Their study involved more than 2,800 children ages 6 through 19,
who took the survey in the years 2003 through 2008. They
compared BPA levels in their urine to their weight, and divided
them into four groups based on BPA amounts. The key finding:
About 22 percent of the children with highest levels of BPA were
obese, compared to just 10 percent of kids with the lowest
levels. Was the reverse true? Did the heaviest kids have more
BPA in their urine, and the thinnest kids less? Yes, Trasande
said. But he did not include those numbers in his study, and
declined to provide them. The study raised more questions than
it answered: All this means is that the study raises some
interesting questions, but at this point it's impossible to say
BPA causes childhood obesity, said Linda Birnbaum, director of
the National Institute of Environmental Health Sciences, a
federal agency involved in research on BPA. "It's a hypothesis
that needs further exploration," she said. The American
Chemistry Council, which represents chemic