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Metabolic/Bariatric Surgery Worldwide 2011

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Metabolic/bariatric procedures for the treatment of morbid obesity, as well as for type 2 diabetes, are among the most commonly performed gastrointestinal operations today, justifying periodic assessment of the numerical status of metabolic/bariatric surgery and its relative distribution of procedures.


An email questionnaire was sent to the leadership of the 50 nations or national groupings in the International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO). Outcome measurements were numbers of metabolic/bariatric operations and surgeons, types of procedures performed, and trends from 2003 to 2008 to 2011 worldwide and in the regional groupings of Europe, USA/Canada, Latin/South America, and Asia/Pacific.


Response rate was 84 %. The global total number of procedures in 2011 was 340,768; the global total number of metabolic/bariatric surgeons was 6,705. The most commonly performed procedures were Roux-en-Y gastric bypass (RYGB) 46.6 %; sleeve gastrectomy (SG) 27.8 %; adjustable gastric banding (AGB) 17.8 %; and biliopancreatic diversion/duodenal switch (BPD/DS) 2.2 %. The global trends from 2003 to 2008 to 2011 showed a decrease in RYGB: 65.1 to 49.0 to 46.6 %; an increase, followed by a steep decline, in AGB: 24.4 to 42.3 to 17.8 %; and a marked increase in SG: 0.0 to 5.3 to 27.89 %. BPD/DS declined: 6.1 to 4.9 to 2.1 %. The trends from the four IFSO regions differed, except for the universal increase in SG.


Periodic metabolic/bariatric surgery surveys add to the knowledge and understanding of all physicians caring for morbidly obese patients. The salient message of the 2011 assessment is that SG (0.0 % in 2008) has markedly increased in prevalence.

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We thank the following individuals and nations, or national groupings, for providing the data for this survey: Argentina, Carlos Casalnuovo; Australia, Lilian Kow; Austria, Karl Miller; Belgium, Bruno Dillemans; Brazil, Ricardo Cohen; Chile, Juan Eduardo Contreras Paraguez; Colombia, Rami Mikler; Czech Republic, Martin Fried; Ecuador, Luis Burbano; Egypt, Khaled Gawdat; Finland, Anne Juuti; France, Jean-Marc Chevallier; Germany, Christine Stroh; Greece, Harry Pappis; Guatemala, Estuardo Behrens; Hungary, Bende János; Iceland, Audun Sigurdsson; India, Mahendra Narwaria; Israel, Asnat Raziel; Italy, Nicola Basso; Japan, Kazunori Kasama; Kuwait, Mohammad Aljarallah; Lithuania, Brimas Gintautas; Mexico, Juan Antonio Lopez Corvala; Poland, Mariusz Wylezol; Portugal, Mário Neves; Romania, Nicolae Iordache; Russia, Yury Yashkov; Saudi Arabia, Sultan Al Temyatt; Singapore, Anton Cheng; Slovenia, Tadeja Pintar; South Africa, Tess van der Merwe; Spain, Aniceto Baltasar; Sweden, Ingmar Näslund; Switzerland, Michel Suter; Taiwan, Wei-Jei Lee; The Netherlands, René Klaassen; Turkey, Mustafa Taskin; Ukraine, Andriy Lavryk; United Arab Emirate, Fawaz Torab; UK, Richard Welbourn; USA–Canada, Ranjan Sudan, Jaime Ponce, Clifford Ko, and John Morton. This study was supported by Baxter Healthcare Corporation, Deerfield, IL

Conflict of Interest

Henry Buchwald, MD, PhD received honoraria for manuscript preparation from Baxter Healthcare Corporation, Deerfield, IL. Danette M. Oien has none to declare.

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Correspondence to Henry Buchwald.

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Buchwald, H., Oien, D.M. Metabolic/Bariatric Surgery Worldwide 2011. OBES SURG 23, 427–436 (2013).

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