- Percentage of the population estimated to be obese, with a body mass index (BMI) of 30.0 or higher.
- Percentage of adults who are obese, with a body mass index (BMI) of 30.0 or higher. (2011 BRFSS Methodology)
Obesity is the percentage of adults who are estimated to be obese, defined as having a body mass index (BMI) of 30.0 or higher, according to self-reported height and weight. BMI is equal to weight in pounds divided by height in inches squared and then multiplied by 703. The CDC has a calculator for BMI. The 2014 ranks are based on self-report data from CDC’s 2013 Behavioral Risk Factor Surveillance System (BRFSS). Because of the 2011 change in BRFSS methodology, obesity prevalence from the 2012 Edition onward cannot be directly compared to estimates from previous years (see Methodology).
In no state is the proportion of obesity in the general population less than 1 in 5. The prevalence of obesity ranges from 21.3% of adults in Colorado to more than 35.0% of adults in West Virginia and Mississippi. The national median of obese adults is 29.7%, up from 27.6% in the 2013 Edition. For obesity prevalence by state and age, gender, race/ethnicity, urbanicity, income, or education level, see Health Disparities within States.
Obesity is one of the greatest health threats currently facing the United States. It contributes significantly to a variety of serious diseases including heart disease, type 2 diabetes, stroke, certain cancers, hypertension, liver disease, kidney disease, Alzheimer’s disease, dementia, respiratory conditions, osteoarthritis, as well as poor general health In the United States, more than two-thirds of adults are overweight or obese, and obesity is a leading factor in preventable death, causing an estimated 200,000 deaths per year.  The direct medical costs for treating obesity and obesity-related health problems are overwhelming. In 2008 it was estimated that more than $147 billion was spent on obesity or obesity-related health issues. Compared to smoking, obesity is more prevalent; similar to smoking and excessive alcohol consumption, obesity is highly associated with chronic conditions and overall poor physical health.  The causes of obesity are complex, including lifestyle and the social and physical environment, as well as genetics and medical history. Poor diet and physical inactivity are major lifestyle contributors to obesity. Since the 1980s, energy intake has steadily climbed and energy expenditure has declined, leading to a growing energy imbalance which closely mirrors the obesity rates. There is growing evidence illustrating the importance of the environment in the obesity epidemic and the need for changes in social and physical environments in order to better facilitate changes in lifestyle. Successful interventions have targeted a wide variety of populations with various strategies, from school-based prevention programs to treatment interventions in aging adults.- While obesity is associated with an increased risk of developing numerous health conditions, weight loss is associated with an attenuation of those risks. The CDC has compiled a list of resources for community level interventions aimed at lowering obesity rates.
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