Severely
Obese Are Fastest Growing Segment of Overweight
Americans
(HealthDay
News) -- The proportion of severely obese
Americans -- those with a body mass index
of 40 or more -- increased by 50 percent
from 2000 to 2005, twice as fast as the
increase in moderate obesity, a new study
finds.
During
that same period, the proportion of overweight
people (BMI of 30 or more) increased by
24 percent, and the proportion of those
with a BMI of 50 or more increased by
75 percent. In the past 20 years, the
largest percentage increases have occurred
in the heaviest weight groups, the RAND
Corporation study said.
Body
mass index, or BMI, is a ratio of weight
to height. A typical severely obese man
weighs 300 pounds at a height of 5 feet
10 inches, while a typical severely obese
woman weighs 250 pounds at a height of
5 feet 4 inches.
"The
proportion of people at the high end of
the weight scale continues to increase
at a brisk rate despite increased public
attention on the risks of obesity and
the increased use of drastic weight loss
strategies, such as bariatric surgery,"
report author Roland Sturm, a RAND economist,
said in a prepared statement.
The
study concluded that three percent of
Americans are severely obese. Health costs
for severely obese people are expected
to be double that of normal weight people,
while health costs for moderately obese
people are expected to be 25 percent more.
From
1998 to 2003, the number of bariatric
surgeries in the United States increased
from 13,000 to 100,000. An estimated 200,000
bariatric procedures were done in the
United States in 2006, the study said.
"The
explosion in the use of bariatric surgery
has made no noticeable dent in the trend
of morbid obesity," Sturm said.
He
said the study findings suggest that severe
obesity is not a rare condition among
certain genetically vulnerable people
but, rather, is an integral part of the
U.S. population's weight distribution.
As the entire population becomes heavier,
there are more and more severely obese
people.
RAND
is a nonprofit research organization.
The study is expected to be published
later this year in the journal Public
Health.