Obesity increases the risk of a number of health conditions including hypertension, adverse lipid concentrations, and type 2 diabetes . The prevalence of obesity in the United States increased during the last decades of the 20th century . More recently there appears to have been a slowing of the rate of increase or even a leveling off . Given the health risks
of obesity and its high prevalence, it is important to continue to track the
prevalence of obesity among U.S. adults and children. This report presents
the most recent national estimates of obesity in the United States based on
measured weight and height.
In 2009–2010, over 78 million U.S. adults and about 12.5 million U.S.
children and adolescents were obese. Almost 41 million women and more than 37 million men aged 20 and over were obese in 2009–2010. Among children and adolescents aged 2–19, more than 5 million girls and approximately 7 million boys were obese.
Obesity: Body mass index (BMI) was calculated as weight in kilograms divided by height in meters squared, rounded to one decimal place. Obesity in adults was defined as BMI greater than or equal to 30 . Examples of adult obesity cut points at specific heights are shown in the Table. The definition of obesity for children is not directly comparable with the definition for adults.
Obesity in children was defined as a BMI greater than or equal to the age- and sex-specific 95th percentiles of the 2000 CDC growth charts