Surgical Endoscopy

, Volume 31, Issue 11, pp 4331–4345 | Cite as

The bariatric surgery and weight losing: a meta-analysis in the long- and very long-term effects of laparoscopic adjustable gastric banding, laparoscopic Roux-en-Y gastric bypass and laparoscopic sleeve gastrectomy on weight loss in adults

  • Mahdieh Golzarand
  • Karamollah ToolabiEmail author
  • Roya Farid



Several studies have been investigated to find the long-term effect of bariatric surgery on weight loss; nevertheless, a meta-analysis can detailedly demonstrate the effect of bariatric surgery on weight in morbidly obese patients. This study aimed to assess the long- and very long-term effects of laparoscopic adjustable gastric banding (LAGB), laparoscopic Roux-en-Y gastric bypass (LRYGB), and laparoscopic sleeve gastrectomy (LSG) on weight loss in adults.


An electronic search using PubMed, Scopus, and Google scholar databases was performed for all English-language articles up to May 15, 2016 with no publication date restriction. Outcome was long-term (≥5–10 years) and very long-term (≥10 years) weight reduction that reported as the mean %EWL and changes in BMI from baseline.


Eighty articles with 87 arms were included in this meta-analysis. The excess weight loss percentage (%EWL) was 47.94% and 47.43% after LAGB at ≥5 and ≥10 years, respectively. After LRYGB the %EWL was 62.58% at ≥5 years and 63.52% at ≥10 years. It was 53.25% at ≥5 years after LSG. Results of subgroup analyses have indicated that LRYGB leads to higher %EWL in America and Asia compared with Europe. Meta-regression analyses have shown that there is no significant association between %EWL and baseline age, BMI and length of follow-up after three procedures. However, there is a positive association between gender and %EWL after LRYGB (β = 1.24). No publication bias was found.


These findings suggest that LRYGB is an effective procedure in morbidly obese patients that leads to sustainable weight loss over the long- and very long-term periods in compared with LAGB and LSG.


Laparoscopic adjustable gastric banding Laparoscopic Roux-en-Y gastric bypass Laparoscopic sleeve gastrectomy Weight Bariatric surgery 


Compliance with ethical standards


Drs. Mahdieh Golzarand, Karamollah Toolabi and Mrs. Roya Farid have no conflict of interest or financial ties to disclose.


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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • Mahdieh Golzarand
    • 1
  • Karamollah Toolabi
    • 2
    Email author
  • Roya Farid
    • 3
  1. 1.School of Nutritional Sciences and DieteticsTehran University of Medical SciencesTehranIran
  2. 2.Department of Surgery, Imam Khomeini HospitalTehran University of Medical SciencesTehranIran
  3. 3.Department of Social Sciences and HealthDurham UniversityDurhamUK

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