One of the questions on the form was "Are you more than twenty pounds overweight?" Looking around, being overweight is the default and it would be more efficient to identify the exceptions who are not more than twenty pounds overweight.
BMI (Body Mass Index) is the prevailing way of defining "Overweight" and "Obesity". BMI is gravely flawed because it is blind to body composition.
|According to his BMI, Tim O'Malley is morbidly obese.|
Incidentally, here is a pretty cool calculator for estimating body fat. Working backwards from this I will need to lose 7" off of my waist size as measured at my naval. This will be a quick-check to track progress between skin-fold checks.