The purpose of this report is to propose standards for the successful
treatment of obesity. This process is somewhat arbitrary because obesi
ty is a multifactorial disease and because standards need revision as
diagnostic and treatment techniques improve. Weight loss, the classic
standard of success, does not account for individual variability. Redu
ction in other measures of body size, such as body mass index, percent
age of excess weight, and body fat, may be preferable. Improvement in
known complications of obesity (diabetes mellitus, hypertension, hyper
lipoproteinemia, sleep apnea, and psychosocial problems) are equally v
alid measures of success. Because obesity is a chronic disease, mainte
nance of weight loss is included as a standard of success. Response to
obesity treatment varies, and thus criteria to define minimal, interm
ediate, and full success for each variable are necessary.