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 Only preschool-age children show signs of a
turnaround, with their obesity rates nearly halved in the same
period, according to a new federal study published in the Journal of
the American Medical Association.
"The rapid increase in obesity we saw in the '80s and '90s has
definitely slowed," epidemiologist Cynthia Ogden told Reuters
Health. "There's some glimmer of hope in the new data in relation to
the 2 to 5 year olds."
Ogden, a branch chief at the National Center for Health Statistics
in Rockville, Maryland, a division of the Centers for Disease
Control and Prevention (CDC), is lead author of the new study.
Obesity rates among 2 to 5 year old Americans dropped from 13.9
percent to 8.4 percent between 2003 and 2012, her team reports.
Not all the news on the national state of weight was positive,
however.
Though the overall obesity rate across all U.S. age groups has been
stable since 2003, women 60 years and older have been growing
fatter. Their rate of obesity rose from 31.5 percent to 38 percent
over nine years, the study found.
Ogden and her colleagues used the annual National Health and
Nutrition Examination Surveys to examine obesity trends in
representative samples of Americans between the 2003 - 2004 survey
year and 2011 - 2012.
The 5.5 percentage point drop in the obesity rate among 2 to 5 year
olds mirrored decreases found among preschoolers in previous
studies, the authors write.
A report published last year, for example, found that after doubling
over 30 years, the obesity rate among low-income preschool children
fell in 19 U.S. states and territories (see Reuters story of August
6, 2013 here: reut.rs/OuyauP).
Nonetheless, more than two-thirds of American adults and nearly
one-third of youth aged 2 to 19 years old fell into the overweight
or obese categories in 2011 - 2012.
For adults, body mass index (BMI) - a measure of weight relative to
height - defines obesity. A BMI of 25 and above is considered
overweight, and BMI of 30 or higher, which is equivalent to a
5-foot, 9-inch adult weighing 203 pounds, is considered obese.
For children, BMI calculations also factor-in the weights of other
kids in the same age group.
The report does not discuss reasons for the drop in preschool
obesity or the rising obesity among older women.
"There's been a lot of attention in this country on obesity, but
we've really focused on childhood obesity," Lieutenant Commander
Ashleigh May told Reuters Health.
"We're on the right track it appears with young children, but we
still have a lot of work to do," said May, an epidemiologist in the
CDC's Obesity Prevention and Control branch in Atlanta, Georgia, who
was not involved in the study.
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Contributors to the downward trend among young children may
include increases in breastfeeding, decreases in sugar consumption,
a national program promoting exercise and another that now gives
low-income children more fruits and vegetables, May said.
Dr. David Ludwig, a pediatrics and nutrition researcher at the
Harvard School of Public Health in Boston, read the report as a sign
of a possible tiny step forward in the fight against obesity.
"The key finding is that obesity prevalence throughout the U.S.
population has not changed in the last decade and remains at
historic highs," Ludwig told Reuters Health in an email.
He also cautioned that the decline in obesity rates among preschool
kids could result from chance.
"Nevertheless, if real, the lower prevalence among young children
would be an encouraging sign that national pediatric obesity
prevention efforts - though still grossly inadequate - may be having
some impact," he said.
Michael Jacobson, executive director of the Center for Science in
the Public Interest, told Reuters Health he sees the report as a
sign the obesity epidemic may have peaked.
Gains against obesity in preschool children may be attributable to a
decline in soda consumption and to adding fruit and vegetables to
the federal nutrition program for low-income children, he said.
But Jacobson, who was not involved in the study, pointed out
longstanding disparities among ethnic groups that it reveals. A
stunning 82 percent of African-American women and 77 percent of
Hispanic women were overweight or obese, compared to 63 percent of
white women, in 2011-2012, the report finds.
"That's a real health crisis," Jacobson said. "These numbers are
crying out for some real action."
(The story corrects threshold of obesity in paragraph 12.)
SOURCE: http://bit.ly/1c9i5E4
Journal of the American Medical Association, online February 25,
2014.
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