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We aimed to examine if bariatric surgery was associated with a reduction in the prevalence of depressive and anxiety symptoms among people with obesity.

We pooled data from 49 studies involving 11,255 people with obesity who underwent bariatric surgery. The study outcomes were the prevalence of depressive and anxiety symptoms among these patients pre‐ and post‐surgery.

There was a significant reduction in body mass index (BMI) post‐operatively (pooled d+: −13.3 kg/m² [95% confidence interval [CI] 15.19, −11.47], p < 0.001). The pooled proportion of patients with anxiety symptoms reduced from 24.5% pre‐operatively to 16.9% post‐operatively, with an odds ratio (OR) of 0.58 (95% CI 0.51, 0.67, p < 0.001). The reduction remained significant in women aged ≥40 years and irrespective of post‐operative BMI. There were significant reductions in Hospital Anxiety …