Body Mass Index

The body mass index takes into account height and weight and is not dependent on gender. Although the body mass index does not take into account percentage of body fat, many argue that it is the best measure that doesn't rely strictly on body fat.

The body mass index is calculated by dividing an individual's weight (kg)by the individual's height (meters squared). The formula is: weight (kg)/height squared (m2).

In order to be considered for weight-loss surgery, the individual must weigh at least 100 pounds over their ideal body weight, according to the 1999 Metropolitan Height and Weight Tabels for Adults, or have a BMI of 40 or more. An exception may be considered for persons 80 pounds overweight, or a BMI of 35 - 40, with a severe illness, such as Diabetes.