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Published in: Surgical Endoscopy 8/2014

01-08-2014

Gender influence on long-term weight loss after three bariatric procedures: gastric banding is less effective in males in a retrospective analysis

Authors: Mohamed Bekheit, Khaled Katri, Mohamed Hany Ashour, Bruno Sgromo, Galal Abou-ElNagah, Wael Nabil Abdel-Salam, Jean-Marc Catheline, El-Said El Kayal

Published in: Surgical Endoscopy | Issue 8/2014

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Abstract

Background

Identifying factors that influence weight loss after bariatric surgery is one way to predict a successful surgical outcome. Knowledge of the effect of gender on weight loss after bariatric surgery has not been well demonstrated in the literature despite being noted in every day practice. The aim of this study was to find the influence of gender on long-term weight loss after bariatric surgery.

Methods

A retrospective analysis of data retrieved from a prospectively maintained bariatric database was conducted.

Results

The study included 640 consecutive patients. Their mean age was 38 ± 10 years, mean preoperative body mass index was 44.9 ± 8.4 kg/m2, and mean preoperative excess weight (EW %) was 108.3 ± 38.4 %. The mean of the average excess weight loss (EWL %) was 43.3 ± 42.4 %. Three procedures were utilized: Roux-en-Y gastric bypass (RYGB), vertical banded gastroplasty (VBG), and gastric banding (GB). Both VBG and RYGB induced significantly more EWL % than GB (d = 22.1 %, p < 0.001 and d = 16, p = 0.02, respectively). In patients who underwent VBG and GB, males had significantly lower preoperative EW % (Student t = −4.86, p < 0.001, and Student t = 4.69, p < 0.001, respectively), and postoperative mean of the average EWL % (Student t = −2.43, p = 0.016, and Student t = −3.33, p = 0.002, respectively) than females. In patients who underwent RYGB, there were no differences in the preoperative EW % (t = −1.03, p = 0.309) or the mean of the average EWL % (t = 0.406, p = 0.688). The simple linear regression model used to explain the variability in EWL %, accounted for by the variability in the preoperative EW %, was significant (F = 180, p < 0.001). Analysis of the residual errors in predicting the EWL % revealed no significant difference between males and females after VBG and after RYGB (t = 0.117, p = 0.907 and t = 1.052, p = 0.3, respectively), while it was significant after GB (t = −2.999, p = 0.003).

Conclusion

From our experience, we suggest that GB not to be offered as a first choice for obese male patients.
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Metadata
Title
Gender influence on long-term weight loss after three bariatric procedures: gastric banding is less effective in males in a retrospective analysis
Authors
Mohamed Bekheit
Khaled Katri
Mohamed Hany Ashour
Bruno Sgromo
Galal Abou-ElNagah
Wael Nabil Abdel-Salam
Jean-Marc Catheline
El-Said El Kayal
Publication date
01-08-2014
Publisher
Springer US
Published in
Surgical Endoscopy / Issue 8/2014
Print ISSN: 0930-2794
Electronic ISSN: 1432-2218
DOI
https://doi.org/10.1007/s00464-014-3489-7

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