medical use
The NIH uses body mass index (BMI) to determine whether or not a person is obese, and categorizes overweight people into three grades. Grade 1 represents moderately overweight people with a BMI of 25 kg/sq. m to 29. 9 kg/sq. m; grade 2 obesity covers people with a BMI of between 30 kg/sq. m and 39. 9 kg/sq. m; and grade 3 obesity constitutes people who are massively or morbidly obese, and have a BMI greater than 40 kg/sq. m. Obesity-related conditions and avoidable healthcare expenses such as knee replacements from wear, medications for Type 2 diabetes, and other complications rarely seen in non-obese people cost Americans more than $122.