Statistics for Weight Loss Surgery

Statistical survey of weight loss results after surgery vs. diet
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More Statistics on Bariatric Weight Loss Surgery

According to official statistical estimates, obesity is set to become the leading cause of mortality in the United States by 2005, with a death toll of 500,000 per year. As a result, medical experts are increasingly turning to surgical intervention as a method of obesity treatment. Here are more statistics on such bariatric procedures.

Statistics on Weight Loss after Surgery

Weight loss usually reaches a maximum between 18 and 24 months after bariatric surgery. Average excess weight loss at five years is 48-74 percent after gastric bypass and 50-60 percent after vertical banded gastroplasty. In a statistical review of over 600 bariatric patients following gastric bypass, with 96 percent follow-up, mean excess weight loss still exceeds 50 percent at fourteen years. Another 10 year follow-up series from the University of Virginia reports weight loss of 60 percent of excess weight at 5 years and in the mid 50's between years 6 and 10. Similar statistical surveys have shown similar weight loss results.

Statistics on Weight Loss Without Surgery

Statistical reports show that non-surgical methods alone have not been effective in achieving a medically significant long term weight loss in severely obese adults. The majority of patients typically regain all the weight lost over the next five years. The average medical weight reduction trial is a 10-12 week study with average weight loss of 2.5 kg.

See also:
Statistics on Bariatric Surgery
Statistics For Bariatrics
Statistics for Plastic Surgery
Statistics for Cosmetic Surgeries
Most Popular Cosmetic Surgery Procedures

Sources include:
Pories, W.J., et al., Who would have thought it? An operation proves to be the most effective therapy for adult-onset diabetes mellitus. Ann Surg, 1995. 222(3): p. 339-50; discussion 350-2.
Benotti, P.N., et al., Gastric restrictive operations for morbid obesity. Am J Surg, 1989. 157(1): p. 150-5.
Linner, J.H. and R.L. Drew, Why the Operation We Prefer is the Roux-Y Gastric Bypass. Obes Surg, 1991. 1(3): p. 305-306.
Mason, E.E., Gastric surgery for morbid obesity. Surg Clin North Am, 1992. 72(2): p. 501-13.
Yale, C.E., Gastric surgery for morbid obesity. Complications and long-term weight control. Arch Surg, 1989. 124(8): p. 941-6.
MacLean, L.D., B.M. Rhode, and R.A. Forse, Late results of vertical banded gastroplasty for morbid and super obesity. Surgery, 1990. 107(1): p. 20-7.
Hall, J.C., et al., Gastric surgery for morbid obesity. The Adelaide Study. Ann Surg, 1990. 211(4): p. 419-27.
Perri, M.G. and P.R. Fuller, Success and failure in the treatment of obesity: where do we go from here? Med Exerc Nutr Health, 1995. 4: p. 255-272.
National Task Force on the Prevention and Treatment of Obesity: Very low calorie diets. JAMA, 1993. 270: p. 967-974.
Safer, D.J., Diet, behaviour modification and exercise. A review of obesity treatments from a long term perspective. South Med J, 1991. 84(12): p. 1470-4.


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Laparoscopic or open bariatric surgery, such as gastric banding or bypass is not an easy solution to morbid obesity and weight loss. It is a serious surgical procedure, involving health risks. To produce lasting weight loss it requires a long-term patient commitment to eating a healthy diet and following a regular program of physical exercise. Life-long use of nutritional supplements may also be necessary. So, before deciding, discuss your options fully with your doctor. © 2003-2018 Bariatric-Surgery.Info - Terms - Contact - Information - Resources