The average weight loss in the United States clinical study was approximately 36-38% of excess weight, 2 and 3 years after surgery. A few people lost up to 100% of their excess weight, some did not lose any weight, and a few got heavier. The following table includes information about how much weight patients lost in the U.S. study. Weight loss is described in terms of the percent of the excess weight a person lost (EWL = Weight Loss/Excess Weight X 100).
| All Patients | Diabetic Patients | Super Obese Patients (BMI of at least 50) | ||||
|---|---|---|---|---|---|---|---|
| % | # patients | % | # patients | % | # patients | ||
| Gained over 5% EWL | 2% | 4 | 4% | 1 | 0% | 0 | |
| No change +- 5% EWL | 5% | 9 | 0 | 0 | 9% | 5 | |
| Lost at least 25% EWL | 62% | 110 | 50% | 12 | 58% | 32 | |
| Lost at least 33% EWL | 52% | 93 | 46% | 11 | 53% | 29 | |
| Lost at least 50% EWL | 22% | 39 | 13% | 3 | 15% | 8 | |
| Lost at least 75% EWL | 10% | 18 | 8% | 2 | 4% | 2 | |
| Total number of patients | 178 | 24 | 55 | ||||
| EWL = Excess Weight Loss |
Assume that you weigh 330 pounds. Also assume that for your height your ideal weight is 155 pounds. That means you weigh 175 pounds more than your ideal weight. 38% of 175 pounds is 66.5 pounds.