Abstract
Purpose
This study aims to examine associations between metabolic profile and psychological variables in post-bariatric patients and to investigate if metabolic and psychological variables, namely high-density lipoprotein cholesterol (HDL-C), triglycerides (TG), glycated hemoglobin (HbA 1c), impulsivity, psychological distress, depressive and eating disorder symptoms are independently associated with percentage of excess weight loss (%EWL) after bariatric surgery.
Methods
One hundred and fifty bariatric patients (BMI = 33.04 ± 5.8 kg/m2) who underwent to bariatric surgery for more than 28.63 ± 4.9 months were assessed through a clinical interview, a set of self-report measures and venous blood samples. Pearson’s correlations were used to assess correlations between %EWL, metabolic and psychological variables. Multiple linear regression was conducted to investigate which metabolic and psychological variables were independently associated with %EWL, while controlling for type of surgery.
Results
Higher TG blood levels were associated with higher disordered eating, psychological distress and depression scores. HDL-C was associated with higher depression scores. Both metabolic and psychological variables were associated with %EWL. Regression analyses showed that, controlling for type of surgery, higher % EWL is significantly and independently associated with less disordered eating symptoms and lower TG and HbA_1c blood concentrations (R 2 aj = 0.383, F (4, 82) = 14.34, p < 0.000).
Conclusion
An association between metabolic and psychological variables, particularly concerning TG blood levels, disordered eating and psychological distress/depression was found. Only higher levels of disordered eating, TG and HbA_1c showed and independent correlation with less weight loss. Targeting maladaptive eating behaviors may be a reasonable strategy to avoid weight regain and optimize health status post-operatively.
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Acknowledgments
This research was partially supported by Fundação para a Ciência e a Tecnologia/Foundation for Science and Technology through European Union COMPETE program Grant to Eva Conceição (IF/01219/2014) and (PTDC/MHC-PCL/4974/2012), doctoral scholarship (SFRH/BD/104159/2014) to Ana Pinto-Bastos and doctoral scholarship (SFRH/BD/104182/2014) to Sofia Ramalho.
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On behalf of all authors, the corresponding author states that there is no conflict of interest.
Ethical approval
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
Informed consent
Informed consent was obtained from all individual participants included in the study.
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Brandão, I., Ramalho, S., Pinto-Bastos, A. et al. Metabolic profile and psychological variables after bariatric surgery: association with weight outcomes. Eat Weight Disord 20, 513–518 (2015). https://doi.org/10.1007/s40519-015-0199-7
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DOI: https://doi.org/10.1007/s40519-015-0199-7