A clear and significant increase in obesity continued from 1999 through 2014, according to an analysis of data on United States children and adolescents age 2 to 19 years.
In 2013-2014, 17.4% of children met criteria for class I obesity, 6.1% for class II, and 2.3% for class III, none statistically different than 2011-2012. Because children are growing, obesity is defined using BMI growth charts, but values are equivalent to an adult BMI of 30.0 to 34.9 for class 1 obesity. Class 2 obesity is a BMI of 35.0 to 39.9, and class 3 obesity is a BMI ?40.0.