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Healthcare costs are reduced following bariatric surgery

Patients with diabetes see nearly double the cost savings

A study based on national insurance claims in the US found that patients with obesity who had gastric bypass surgery cut their healthcare costs by nearly 40 percent after four years, and by 80 percent, if they also had type 2 diabetes before surgery.  The findings, ‘Bariatric Surgery Reduces National Healthcare Utilization in the Long-Term’, were presented at ObesityWeek 2015 hosted by the American Society for Metabolic and Bariatric Surgery (ASMBS) and The Obesity Society (TOS).

Healthcare costs among patients who had laparoscopic gastric bypass were US$7,592 less than they were for an equal number of matched patients with severe obesity who did not have surgery – a savings of nearly 40 percent. Patients with diabetes saw a 78 percent drop in costs, which translates to savings of US$22,609, when compared to their  non-surgical counterparts after four years. About 70 percent of patients experienced remission of their diabetes after surgery.

“The main reduction in costs were related to fewer hospital admissions and clinic visits, and a reduction in the use of prescription drugs for diabetes, hypertension, and heart disease,” said study-co-author, Dr John M Morton, Chief, Bariatric and Minimally Invasive Surgery, Stanford University School of Medicine and president of the ASMBS. “Costs were higher across the board for patients who did not have bariatric surgery showing there is an even higher cost to not treating obesity, in dollars as this study shows and in longevity and quality of life, as many other studies have shown.”

Morton and researchers analysed data from the Truven Health Analytics Commercial Claims (MarketScan) database, which consists of insurance claims from at least 15 million people. A total of 823 laparoscopic gastric bypass patients were identified and propensity matched to 786 non-surgical patients based on age, sex and geographic region, in addition to the presence of diabetes, hypertension, hyperlipidaemia and severe obesity one year before surgery. All surgeries took place in 2008 and all patients were continuously covered by insurance for the study period, which covered 2004 to 2012.

In the study, the average cost of gastric bypass surgery was US$25,238. In each of the four years after surgery healthcare costs dropped by 12 percent, 28 percent, 37 percent and 35 percent, respectively. Costs dropped even more dramatically for those who had diabetes. In the first year, costs were 23 percent lower and continued to drop over the next three years, 49 percent, 61 percent and 69 percent, respectively. Researchers say the trend toward lower costs is expected to continue for surgical patients beyond the four years of the study period, while costs for non-surgical patients are expected to increase. 

“The findings show treating obesity has important health benefits that translate into real cost savings,” said Dr Robin Blackstone, Chief, Section of Bariatric and Metabolic Surgery at Banner - University Medical Center, who was not involved in the study. “Bariatric surgery saves lives and money and is one of the best investments patients and their insurers can make.”

In addition to Morton, co- authors of the study were Drs Stacy Brethauer, Jaime Ponce, Raul Rosenthal and Ninh Nguyen. 

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American Society for Metabolic and Bariatric Surgery

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