Background

The Perceptions of Bariatric Surgery survey was designed to identify opportunities for weight loss interventions. The survey’s dietary self-efficacy domain measures adherence to recommended nutrition-related behaviors for weight loss. Our objective was to determine the correlation between self-efficacy scores and percent weight loss after bariatric surgery.

Methods

The dietary domain was subdivided into 4 subdomains measuring self-efficacy for: utilization of gastric restriction (portion minimization and mindfulness), self-monitoring, satiety monitoring, and impulse regulation. Data were collected pre-surgery and 1 year post-surgery. Scores were calculated and plotted against percent weight loss after 1 year. Initial scores were compared to a patient cohort that elected not to have weight loss surgery.

Results

Surgery patients (n=30) had a mean initial dietary domain score of 82.63% (± 1.9, median 80.5) and non-surgery patients (n=31), M=84.68% (± 2.1, median 87); two-tailed Mann-Whitney test indicated a non-significant p=0.42 (U=408.5). Subdomains aligned closely; mindfulness p=0.20, self-monitoring p=0.43, satiety monitoring p=0.99, and impulse regulation p=0.39. Initial scores did not correlate with percent weight loss at 1 year; however, follow up scores were significantly correlated for dietary domain (r=0.58, p<.001), mindfulness (r=0.64, p<0.001), satiety monitoring (r=0.43 p<0.05), and impulse regulation (r=0.47 (p<0.01), but not self-monitoring (r=0.33, p=0.07). Absolute change in self-efficacy scores also significantly correlated for dietary domain (r=0.52, p<0.01), mindfulness (r=0.5, p=0.01), satiety monitoring (r=0.52, p<0.01), and impulse regulation (r=0.51, p<0.01).

Conclusions

Perceived self-efficacy scores correlate with percent weight loss 1 year after bariatric surgery. Baseline self-efficacy scores are similar in patients with obesity that may or may not proceed with weight loss surgery.