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Obesity Surgery
Erschienen in: Obesity Surgery 4/2013

01.04.2013 | Clinical Report

Preoperative Fat-Free Mass: A Predictive Factor of Weight Loss after Gastric Bypass

verfasst von: Maud Robert, Elise Pelascini, Emmanuel Disse, Philippe Espalieu, Gilles Poncet, Martine Laville, Christian Gouillat

Erschienen in: Obesity Surgery | Ausgabe 4/2013

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Abstract

Weight loss failure occurs in 8 % to 40 % of patients after gastric bypass (GBP). The aim of our study was to analyse the predictive factors of weight loss at 1 year so as to select the best candidates for this surgery and reduce the failures. We included 73 patients treated by laparoscopic GBP. We retrospectively analysed the predictive factors of weight loss in kilograms as well as excess weight loss in percentage (EWL%) at 1 year. The population was divided into tertiles so as to compare the sub-group with the highest weight loss with the sub-group with the least satisfactory results. The significantly predictive factors of a better weight loss in kilograms were male, higher initial weight (144 versus 118 kg, p = 0.002), a significant early weight loss and a higher preoperative percentage of fat-free mass (FFM%; p = 0.03). A higher FFM% was also associated with a better EWL% (p = 0.004). The preoperative FFM (in kilograms) was the principal factor accounting for the weight loss at 1 year regardless of age, gender, height and initial body mass index (BMI; p < 0.0001). There was a better correlation between FFM and weight loss (Spearman test, p = 0.0001) than between initial BMI and weight loss (p = 0.016). We estimated weight loss at 1 year according to initial FFM using the formula: 0.5 kg of lost weight per kilogram of initial FFM. The initial FFM appears to be a decisive factor in the success of GBP. Thus, the sarcopoenic patients would appear to be less suitable candidates for this surgery.
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Metadaten
Titel
Preoperative Fat-Free Mass: A Predictive Factor of Weight Loss after Gastric Bypass
verfasst von
Maud Robert
Elise Pelascini
Emmanuel Disse
Philippe Espalieu
Gilles Poncet
Martine Laville
Christian Gouillat
Publikationsdatum
01.04.2013
Verlag
Springer-Verlag
Erschienen in
Obesity Surgery / Ausgabe 4/2013
Print ISSN: 0960-8923
Elektronische ISSN: 1708-0428
DOI
https://doi.org/10.1007/s11695-012-0781-2

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