Efficacy and safety of one anastomosis gastric bypass versus Roux-en-Y gastric bypass for obesity (YOMEGA): a multicentre, randomised, open-label, non-inferiority trial. Lancet 2019; 393: 1299-1309.

Published: 21st June 2019

Authors: Maud R, Espalieu P, Pelascini E, Caiazzo R, Sterkers A, Khamphommala L et al.


In this study that included 253 procedures, mean excess BMI weight loss was similar after the one anastomosis method (-87.9 per cent) compared to standard Roux-en-Y (-85.8 per cent). There were higher rates of diarrhoea, steatorrhoea and nutritional complications after the new procedure.

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