RT Book, Section A1 Wu, Jacqueline J. A1 Perugini, Richard A. A2 McKean, Sylvia C. A2 Ross, John J. A2 Dressler, Daniel D. A2 Brotman, Daniel J. A2 Ginsberg, Jeffrey S. SR Print(0) ID 56196085 T1 Chapter 68. Common Surgical Options for Treatment of Obesity T2 Principles and Practice of Hospital Medicine YR 2012 FD 2012 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-160389-8 LK accessmedicine.mhmedical.com/content.aspx?aid=56196085 RD 2024/04/24 AB Obesity has become a global problem. The definition and classification of obesity is based on the body mass index (BMI), which is calculated as weight in kilograms divided by height in meters squared. An estimated 1.7 billion adults worldwide are now considered overweight (BMI > 25 kg/m2). Of these, 300 million are obese (BMI > 30 kg/m2). In the United States, two-thirds of adults are overweight, one-third of adults are considered obese, and almost 5% are morbidly obese (BMI > 40 kg/m2). In addition, the number of obese children has more than doubled over the past 3 decades to 16%. The more than 50 million obese Americans are at risk of developing numerous obesity-related health problems, including hypertension, diabetes, and coronary artery disease, to name just a few (Table 68-1).