Psychological predictors of poor weight loss following LSG: relevance of general psychopathology and impulsivity
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After bariatric surgery (BS) a significant minority of patients do not reach successful weight loss or tend to regain weight. In recent years, interest for the psychological factors that predict post-surgical weight loss has increased with the objective of developing interventions aimed to ameliorate post-surgical outcomes. In the present study, predictive models of successful or poor weight loss 12 months after BS were investigated considering pre-surgery level of psychopathological symptoms, dysfunctional eating behaviors and trait impulsivity at baseline (pre-surgery).
Sixty-nine patients with morbid obesity canditates for laparoscopic sleeve gastrectomy were assessed regarding metabolic and psychological dimensions. Successful post-surgery weight loss was defined as losing at least 50% of excess body weight (%EWL).
Logistic models adjusted for patient sex, age and presence of metabolic diseases showed that the baseline presence of intense psychopathological symptoms and low attentional impulsivity predict poor %EWL (< 50%), as assessed 12-month post-surgery.
The present findings suggest that intensity of general psychopathology and impulsivity, among other psychological factors, might affect post-surgery %EWL. Conducting adequate psychological assessment at baseline of patients candidates for BS seems to be crucial to orient specific therapeutic interventions.
Level of evidence
Level III, case-control analytic study.
KeywordsPsychological predictors of weight loss Impulsivity Psychopathology Bariatric surgery Laparoscopic sleeve gastrectomy
This research and some of the authors (G.T. and F.F-A.) were partially funded by Instituto de Salud Carlos III (ISCIII) (Grant numbers: PI17/01167). CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn) is an initiative of ISCII.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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.
The Ethical Committee of the Padua University Hospital (include name of committee + reference number) approved the study.
All subjects gave their informed consent after we provided a full explanation of the study.
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