Obesity is epidemic in the United States. More than 50% of US adults
are now overweight, based on a body mass index (BMI) of 25 kg/m2
or more.1 Furthermore, 22% of the US adult
population is obese, based on a BMI of 30 kg/m2
or more, equivalent to approximately 13.5 kg (30 lb) overweight. Three percent
of US adults have a BMI of 40 kg/m2 or more,
which represents a weight excess of approximately 45 kg (100 lb). Blacks and
Hispanics are disproportionally affected. As the study by Mokdad and colleagues
in this issue of THE JOURNAL2 clearly demonstrates,
the increase in the prevalence of obesity has been rapid. No area of the country
has been spared.
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