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Obesity Surgery
Published in: Obesity Surgery 3/2016

01-03-2016 | Original Contributions

Sleeve Gastrectomy and Roux-en-Y Gastric Bypass Lead to Comparable Changes in Body Composition after Adjustment for Initial Body Mass Index

Authors: Mirko Otto, Mohamad Elrefai, Johannes Krammer, Christel Weiß, Peter Kienle, Till Hasenberg

Published in: Obesity Surgery | Issue 3/2016

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Abstract

Background

Bariatric surgery is a safe and established treatment option of morbid obesity. Mere percentage of excess weight loss (%EWL) should not be the only goal of treatment.

Methods

One hundred seventy-three obese patients were included in the study. They underwent either Roux-en-Y gastric bypass (RYGB; n = 127, mean body mass index (BMI) 45.7 ± 5.7 kg/m2) or sleeve gastrectomy (SG; n = 46, mean BMI 55.9 ± 7.8 kg/m2) for weight reduction. Body weight and body composition were assessed periodically by bioelectrical impedance analysis.

Results

After 1 year of observation, %EWL was 62.9 ± 18.0 % in RYGB and 52.3 ± 15.0 % in SG (p = 0.0024). Body fat was reduced in both procedures with a slight preference for SG, and lean body mass was better preserved in the RYGB group. Due to significant differences in the initial BMI between the two groups, an analysis of covariance was performed, which demonstrated no significant differences in the %EWL as well as in the other parameters of body composition 1 year after surgery. Using percentage of total weight loss to evaluate the outcomes between the two procedures, no significant difference was found (31.7 ± 8.4 % in RYGB and 30.5 ± 7.6 % in SG patients, p > 0.4).

Conclusions

Excess weight loss is highly influenced by the initial BMI. Total weight loss seems to be a better measurement tool abolishing initial weight differences. SG and RYGB do not differ in terms of body composition and weight loss 1 year after surgery.
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Metadata
Title
Sleeve Gastrectomy and Roux-en-Y Gastric Bypass Lead to Comparable Changes in Body Composition after Adjustment for Initial Body Mass Index
Authors
Mirko Otto
Mohamad Elrefai
Johannes Krammer
Christel Weiß
Peter Kienle
Till Hasenberg
Publication date
01-03-2016
Publisher
Springer US
Published in
Obesity Surgery / Issue 3/2016
Print ISSN: 0960-8923
Electronic ISSN: 1708-0428
DOI
https://doi.org/10.1007/s11695-015-1792-6

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