Results of a large national study show that nearly three-quarters of obese patients with type 2 diabetes who undergo weight-loss surgery are able to stop insulin and other antidiabetes drugs within six months.
In the Johns Hopkins study of insured, obese, diabetic patients, researchers also found that in the third year following surgery, average annual health care costs per patient decreased by more than 70 percent. The study is published in the Archives of Surgery this month.
"The cost to care for the average obese diabetic person in America is $10,000 a year, which could be cut to $1,800 with a very safe operation that eliminates more than 80 percent of the medications these individuals have depended on," says Marty Makary, M.D., M.P.H., an associate professor of surgery at the Johns Hopkins University School of Medicine and the study's leader. "The results show that bariatric surgery has huge implications for public health and control of health care costs."
Makary and his colleagues studied 2,235 adults with Blue Cross/Blue Shield insurance from throughout the United States who had type 2 diabetes and underwent bariatric surgery during a four-year period from January 1, 2002 to December 31, 2005. The average age of those in the study was 48 years old and 74.5 percent were women. More than 23 percent of participants were insulin dependent while more than 50 percent took metformin hydrochloride to keep their diabetes in check.
Makary and his colleagues found that within one year following surgery, the number of patients dependent on insulin dropped from 524 (23.4 percent) to 101 (5.5 percent). Those on metformin dropped from 1,129 (50.5 percent) to 156 (8.4 percent).
Bariatric surgery, at an average cost of $30,000, reduces stomach capacity, typically by stapling off the stomach and creating a much smaller pouch. Studies show it results in long-term weight loss, improved lifestyle and decreased mortality in some populations. Its use has increased 200 percent during the last five years, the authors note.
The risk of mortality from bariatric surgery is .3 percent. Makary points out that the health risks associated with diabetes and obesity are much greater.