JAMA Surg: The risk of readmission after Roux-en-Y gastric bypass surgery is an important reason for its low cost effectiveness.

!---- The cost-effectiveness of roux-en-Y gastric bypass (RYGB) has been controversial, with researchers recently examining the use and spending of health insurance for five years after patients received RYGBThe population cohort study, conducted in Ontario, Canada, collected data on patients who underwent Roux-en-Y gastric bypass surgery between March 1, 2010 and March 31, 2013, and analyzed data on health care use and expenditure for the five years before surgery and five years after surgery, with the main findings being total health care expenditureThe study recruited 1,587 patients who received RYGB (average age: 47 years) and 1,587 control group participants (average age: 47 years), 1,228 women (77.4 percent) in each group, with an average BMI of 46The average total medical expenditure per RYGB group of patients increased from CAD$15594 in the first 5 years of surgery to CAD$30389 in the 5 years after surgery, with a difference of CAD$14795 for the control group, the average health care expenditure of participants changed from CAD$16109 to 22169, with a difference of 3964Overall, the difference in THE net cost of RYGB was estimated to be CAD$10831, mainly due to the increase in the number of hospitalizations in the first 3 years after RYGB, and the difference in total expenditure between RYGB and the control queue was not significant in the 4th-5th year after surgeryThe study found that obese patients who underwent Roux-en-Y gastric bypass had higher health care spending within three years of surgery, and the study showed that it was necessary to reduce the risk of readmission and emergency care after surgical bariatric surgery