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LSG vs OAGB—1 Year Follow-up Data—a Randomized Control Trial



Laparoscopic sleeve gastrectomy (LSG) is one of the most popular bariatric procedure. One anastomosis gastric bypass (OAGB) is rapidly emerging as a safe and effective metabolic procedure. This study aims at comparing the 1-year follow-up results of OAGB and LSG in terms of excess weight loss, complications, resolution of comorbidities, and quality of life.


A prospective randomized study of results between 100 LSG and 101 OAGB patients was done from 2012 to 2015. The results were compared regarding operative outcomes, percentage of excess weight loss, complications, resolution of comorbidities, and quality of life (BAROS score).


The mean BMI for the OAGB and LSG group was 44.31 and 43.75 kg/m2, respectively. Percentage of excess weight loss (%EWL) for OAGB vs LSG was 66.87 ± 10.87 vs 63.97 ± 13.24 at 1 year (p > 0.05), respectively. Diabetes remission was 83.63 % in OAGB patients and 76.58 % in LSG patients. Remission of hypertension is 64.15 % in OAGB patients and 66.07 % in LSG patients. Bariatric Analysis Reporting and Outcome System (BAROS) was 3.71 in LSG and 3.96 in OAGB.


In our study, there was no significant difference between LSG and OAGB in outcome at 1 year follow-up in % excess weight loss, remission of HTN, and quality of life. OAGB has marginally better outcome in T2 DM remission. However, a longer follow-up is required to establish a correct comparative result.

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We extend our heartfelt gratitude to Dr. Aruna Tantia, Dr. Pramod Sureka, Dr. Ramanuj Mukherjee, Dr. Bimalendu Sen, Dr. Debjit Ghosh, Ram Sundar Bhandari, OT staffs, Shampa Ghosh, Jhuma Chowdhury, Sonam Gupta, and Hanie Gupta who have worked to make this project a success. The staffs of ILS Hospital deserve special mention for the dedicated support.

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Correspondence to Om Tantia.

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Conflict of Interest

Dr. Shivakumar S, Dr. Om Tantia, Dr. Ghanshyam Goyal, Dr. Tamonas Chaudhuri, Dr. Shashi Khanna, Dr. Jagat Pal Singh, and Dr. Anmol Ahuja declare that they have no conflict of interest.

Statement of Informed Consent

Informed consent was obtained from all individual participants included in the study.

Statement of Human and Animal Rights

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Seetharamaiah, S., Tantia, O., Goyal, G. et al. LSG vs OAGB—1 Year Follow-up Data—a Randomized Control Trial. OBES SURG 27, 948–954 (2017).

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  • One anastomosis gastric bypass (OAGB)
  • Laparoscopic sleeve gastrectomy (LSG)
  • Bariatric Analysis Reporting and Outcome System (BAROS)
  • Gastro-esophageal reflux disease (GERD)
  • Excess weight loss (EWL)