Comparison of Changes in Body Weight and Serum Lipid Profile after Roux-en-Y Gastric Bypass between Non-obese Patients and Obese Patients

Park, Jung Hwan; Hong, Sang Mo; Lee, Chang Bum; Ahn, You Hern; Kim, Dong Sun

Abstract

BACKGROUND
This study was aimed to investigate the effects of bariatric surgery in non-obese patients through the comparison of the changes in body weight (BW) and serum lipid profile between non-obese and obese patients after Roux-en-Y gastric bypass.
METHODS
In this study, 116 patients who received laparoscopic Roux-en-Y gastric bypass due to early gastric cancer were included. Patients were divided into two groups, non-obese group (N=76), defined as body mass index <25 kg/m2, and obese group (N=40), body mass index > or =25 kg/m2. BW and serum lipid profile before surgery and at 3, 6, 9, and 12 months after surgery were examined.
RESULTS
In all groups, BW and triglyceride (TG) showed significant (P<0.05) decrease after surgery, while high-density lipoprotein cholesterol (HDL-C) showed a significant increase during the first 3 months after surgery, in obese group. Total cholesterol and low-density lipoprotein cholesterol (LDL-C) decreased. However, the effect was significant for only a limited time period after surgery. Mean percentages of BW loss and TG decrease were greater in the obese group after surgery, however, the change was significant for only a limited time period after surgery. Mean percentage of HDL-C increase in non-obese group was greater but was not statistically significant. There were no differences in mean percentages of total cholesterol and LDL-C decrease between the two groups.
CONCLUSION
At 12 months after surgery, all groups showed significant improvement in BW and serum lipid profile. However, mean percentages in BW loss, TG decrease, and HDL-C increase between the two groups were different.