Relationship among Self-Efficacy Expectations, Locus of Control, and Attributions in Bariatric Patients

Carla Ugarte, Álvaro Quiñones, Luis Angel Saúl

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Background: Bariatric surgery is the most effective method for achieving accelerated weight loss. However, in the short-and medium-term, between 20% and 40% of patients regain a significant percentage of the weight lost. Cognitive and attitudinal psychological variables contribute to explaining weight regain. The aim of this study was to analyze differences in self-efficacy, locus of control, and attributions among bariatric patients, in accordance with weight maintenance or weight regain. Methods: Participants were classified according to weight regain (≥15% weight regain) and weight maintenance (<15% weight regain). A receiver operating characteristic (ROC) curve analysis was employed to assess the diagnostic value of the locus of control for weight loss and to establish a cutoff point to differentiate those who maintained weight loss from those who regained more than 15% of the weight lost. Results: Those who maintained weight loss showed a statistically higher locus of control ratio than those who regained weight. The locus of control ratio was associated with a lower risk of weight regain (odds ratio 0.760, p = 0.018). Using the area under the ROC curve (AUC), the locus of control significantly identified those who maintained weight (AUC = 0.761; p = 0.001). The maximum combination of sensitivity and specificity was shown at the cutoff point of 39. Qualitative results show a difference in the type of attributions and expectations according to current weight maintenance or weight regain status. Conclusion: Participants’ selfefficacy expectations, locus of control, and attributions change in accordance with the outcome achieved in terms of weight regain or weight maintenance.

Original languageEnglish
Article number7107
JournalInternational Journal of Environmental Research and Public Health
Issue number12
StatePublished - 1 Jun 2022
Externally publishedYes


  • gastric bypass
  • mixed design
  • sleeve gastrectomy
  • weight regain


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