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01-05-2018 | Original Contributions

Predictors of Success in Bariatric Surgery: the Role of BMI and Pre-operative Comorbidities

Authors: Magda Rosa Ramos da Cruz, Alcides José Branco-Filho, Marília Rizzon Zaparolli, Nathalia Farinha Wagner, José Simão de Paula Pinto, Antônio Carlos Ligocki Campos, Cesar Augusto Taconeli

Published in: Obesity Surgery | Issue 5/2018

Abstract

Background

This is a retrospective review of 204 patients who underwent bariatric surgery. The impact of weight regain (WR), pre-operative comorbidities and BMI values on the recurrence of comorbidities was evaluated, and an equation was elaborated to estimate BMI at 5 years of bariatric surgery.

Methods

Pre-operative data, after 1 year and after 5 years, was collected from the medical records. Descriptive analyses and bivariate hypothesis tests were performed first, and then, a generalised linear regression model with Tweedie distribution was adjusted. The hit rate and the Kendall coefficient of concordance (Kendall’s W) of the equation were calculated. At the end, the Mann-Whitney test was performed between the BMI, WR and the presence of comorbidities, after a post-operative period of 5 years.

Results

The adjustment of the model resulted in an equation that estimates the mean value of BMI 5 years after surgery. The hit rate was 82.35% and the value of Kendall’s W was 0.85 for the equation. It was found that patients with comorbidities presented a higher median WR (10.13%) and a higher mean BMI (30.09 kg/m²) 5 years after the surgery.

Conclusions

It is concluded that the equation is useful for estimating the mean BMI at 5 years of surgery and that patients with low pre-operative HDL and folic acid levels, with depression and/or anxiety and a higher BMI, have a higher BMI at 5 years of surgery and higher incidence of comorbid return and dissatisfaction with post-operative results.

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Title: Predictors of Success in Bariatric Surgery: the Role of BMI and Pre-operative Comorbidities
Authors: Magda Rosa Ramos da Cruz
Alcides José Branco-Filho
Marília Rizzon Zaparolli
Nathalia Farinha Wagner
José Simão de Paula Pinto
Antônio Carlos Ligocki Campos
Cesar Augusto Taconeli
Publication date: 01-05-2018
Publisher: Springer US
Published in: Obesity Surgery / Issue 5/2018
Print ISSN: 0960-8923
Electronic ISSN: 1708-0428
DOI: https://doi.org/10.1007/s11695-017-3011-0

At a glance: The STEP trials

Springer Medicine

Predictors of Success in Bariatric Surgery: the Role of BMI and Pre-operative Comorbidities

Abstract

Background

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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