U.S. Obesity Trends
Data and Statistics
During the past 20 years there has been a dramatic increase in obesity in the United States. In 2008, only one state (Colorado) had a prevalence of obesity less than 20%. Thirty-two states had prevalence equal to or greater than 25%; six of these states (Alabama, Mississippi, Oklahoma, South Carolina, Tennessee, and West Virginia) had a prevalence of obesity equal to or greater than 30%. Obesity is defined as a body mass index (BMI) of 30 or greater. BMI is calculated from a person's weight and height and provides a reasonable indicator of body fatness and weight categories that may lead to health problems. Obesity is a major risk factor for cardiovascular disease, certain types of cancer, and type 2 diabetes.
Childhood Overweight and Obesity
Obesity is a
serious health concern for children and adolescents. Data from NHANES surveys
(1976–1980 and 2003–2006) show that the prevalence of obesity has increased: for
children aged 2–5 years, prevalence increased from 5.0% to 12.4%; for those aged
6–11 years, prevalence increased from 6.5% to 17.0%; and for those aged 12–19
years, prevalence increased from 5.0% to 17.6%.1, 46
Obese children and adolescents are at risk for health problems during their youth and as adults. For example, during their youth, obese children and adolescents are more likely to have risk factors associated with cardiovascular disease (such as high blood pressure, high cholesterol, and Type 2 diabetes) than are other children and adolescents.2
Obese children and adolescents are more likely to become obese as adults.3, 4 For example, one study found that approximately 80% of children who were overweight at aged 10–15 years were obese adults at age 25 years.3 Another study found that 25% of obese adults were overweight as children.5 The latter study also found that if overweight begins before 8 years of age, obesity in adulthood is likely to be more severe.