Prevalence of obesity in Asia has been on the increasing trend, with corresponding increase in utilisation of bariatric surgery. The objective of this study was to examine differences in weight loss outcomes following bariatric surgery between Asian ethnicities.
Materials and Methods
A retrospective database review was conducted of patients undergoing primary laparoscopic sleeve gastrectomy between 2009 and 2013 in 14 centres from Singapore, Malaysia, Taiwan, Hong Kong, Japan, Korea, India, Australia, Switzerland, and the USA. All patients with available follow-up data at 12 months and 36 months post-surgery were included in this study. Outcome measures used were percentage excess weight loss (%EWL) and percentage total weight loss (%TWL). Differences in outcomes between ethnicities were analysed after adjusting for age, gender, baseline body mass index (BMI), and presence of diabetes.
The study population (n = 2150) consisted of 1122 Chinese, 187 Malays, 309 Indians, 67 Japanese, 259 Koreans, and 206 Caucasians. 67.1% were female and 32.9% were male. Mean age was 37.1 ± 11.2 years. Mean pre-operative BMI was 40.7 ± 8.1 kg/m2. With the Caucasian population as reference, Japanese had the best %TWL (3.90, 95% CI 1.16–6.63, p < 0.05) and %EWL (18.55, 95% CI 10.33–26.77, p < 0.05) while the Malays had the worst outcomes. Both Chinese and Koreans had better %EWL but worse %TWL as compared to Caucasians and there were no significant differences with the Indian study group.
There are differences in weight loss outcomes following bariatric surgery between Asian ethnicities.
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Conflict of Interest
The authors declare that they have no conflict of interests.
Statement of Informed Consent
No formal consent was required as this was a retrospective study.
A Statement of Human and Animal Rights
This study has been approved by the Institutional Review Board of each institution and all procedures were conducted in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Koh, Z.J., Tai, B.C., Kow, L. et al. Influence of Asian Ethnicities on Short- and Mid-term Outcomes Following Laparoscopic Sleeve Gastrectomy. OBES SURG 29, 1781–1788 (2019). https://doi.org/10.1007/s11695-019-03716-8
- Bariatric surgery
- Asian ethnicity
- Sleeve gastrectomy
- Weight loss outcomes