Metabolic Bariatric Surgery Across the IFSO Chapters: Key Insights on the Baseline Patient Demographics, Procedure Types, and Mortality from the Eighth IFSO Global Registry Report
Authors: Brown Wendy A. , Liem Ronald , Al-Sabah Salman , Anvari Mehran , Boza Camilo , Cohen Ricardo V. , Ghaferi Amir , Våge Villy , Himpens Jacques , Kow Lilian , Morton John , Musella Mario , Pattou Francois , Sakran Nasser , Clapp Benjamin , Prager Gerhard , Shikora Scott ,   on behalf of the IFSO Global Registry Collaboration, Campbell Angus , Holland Jennifer , Cottrell Jenifer , Thompson Robin , Brown Dianne , Brown Wendy , Caterson Ian , Langer Felix , Beckerhinn Philipp , Prager Gehard , Omerov Taryel , Otani Karina , Cohen Ricardo , Barlow Karen , Anvari Mehran , Boza Camilo , Villaseca Amalia , Wang Cunchuan , Yang Wah , Lazzati Andrea , Lechaux David , Leborgne Valerie , Pattou Francois , Kermansaravi Mohammad , Globus Inbal , Sakran Nasser , Musella Mario , Schiavone Vincenzo , Franzese Antonio , Lee Sang Kuon , Al-Sabah Salman , Mahmood Nik Ritza Kosai Nik , Muthkumaran Guhan , Ali Ismail Ahmed , Shunxing Teh , Yusof Nursuhadah Mohamed , Villarreal José G. Rodríguez , Bruinsma Floris , Liem Ronald , Nienhuijs Simon , Greve Jan Willem , Campbell Angus , Holland Jennifer , Cottrell Jenifer , Thompson Robin , Brown Dianne , MacCormick Andrew , Caterson Ian , Lyyjynen Hannu , Vage Villy , Khatsiev Bekkhan , van Zyl Eugene , van der Merwe Tess , Ottoson Johan , Curry Andrew , Clapp Benjamin , Morton John , Bonham Aaron J. , Stricklen Amanda , Ross Rachel , Ghaferi Amir , Jumaev Nozim , Monsalve Pedro , Level Luis 
Published: April 2024

Abstract
Introduction
The International Federation for Surgery for Obesity and Metabolic Disorders (IFSO) Global Registry aims to provide descriptive data about the caseload and penetrance of surgery for metabolic disease and obesity in member countries. The data presented in this report represent the key findings of the eighth report of the IFSO Global Registry.

Methods
All existing Metabolic and Bariatric Surgery (MBS) registries known to IFSO were invited to contribute to the eighth report. Aggregated data was provided by each MBS registry to the team at the Australia and New Zealand Bariatric Surgery Registry (ANZBSR) and was securely stored on a Redcap™ database housed at Monash University, Melbourne, Australia. Data was checked for completeness and analyzed by the IFSO Global Registry Committee. Prior to the finalization of the report, all graphs were circulated to contributors and to the global registry committee of IFSO to ensure data accuracy.

Results
Data was received from 24 national and 2 regional registries, providing information on 502,150 procedures. The most performed primary MBS procedure was sleeve gastrectomy, whereas the most performed revisional MBS procedure was Roux-en-Y gastric bypass. Asian countries reported people with lower BMI undergoing MBS along with higher rates of diabetes. Mortality was a rare event.

Conclusion
Registries enable meaningful comparisons between countries on the demographics, characteristics, operation types and approaches, and trends in MBS procedures. Reported outcomes can be seen as flags of potential issues or relationships that could be studied in more detail in specific research studies.