Abstract
Background
Mental health disorders are highly prevalent among bariatric surgery patients. Bariatric surgery induces weight loss with continuous health improvements. However, long-term follow-up data on weight loss and quality of life data of patients who have a mental illness after bariatric surgery are scarce, and it is not clear whether mental illness is associated with more pronounced weight regain. The aim was to investigate the impact of preoperative mental illness on the course of long-term weight changes after bariatric surgery.
Methods
Patients with sleeve gastrectomy (SG) or Roux-en-Y gastric bypass surgery (RYGB) between 2005 and 2013 with a follow-up of at least 3 years were included. The study population was divided into two groups: patients with mental illness (MI) and patients without (No-MI). Weight loss outcomes over time were compared using mixed models up to 4 years after surgery.
Results
In total, 254 patients (RYGB 61.0%, SG 39%) were included. The distribution of baseline characteristics was similar between the MI (n = 108) and No-MI groups (n = 146). The most prevalent mental illness was depressive disorder (63.9%). In the MI group, the percent of total weight loss (%TWL) was significantly smaller over the study period. After 36 months, the predicted mean group-difference of %TWL was 4.6% (95% CI 1.9, 7.2; p = 0.001), and the predicted odds ratio for weight regain was 4.9 (95% CI 1.6, 15.1) for patients in the MI group.
Conclusion
Preoperative mental illness leads to lower long-term weight loss and an increased risk of weight regain after bariatric surgery.
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Acknowledgements
The authors would like to acknowledge Clyde Schechter and Andrew Atkinson for their helpful comments and critical reading of the manuscript.
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Electronic Supplementary Material
Figure S1
Flow diagram (PPTX 36 kb)
Figure S2
Time course after surgery of mean a) BMI and b)%EBMIL of patients with mental illness (black) and without mental illness (gray) with 95% confidence interval. (PNG 9 kb)
Fig S2b
(PNG 9 kb)
Table S1
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Table S2
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Table S3
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Müller, M., Nett, P.C., Borbély, Y.M. et al. Mental Illness Has a Negative Impact on Weight Loss in Bariatric Patients: a 4-Year Follow-up. J Gastrointest Surg 23, 232–238 (2019). https://doi.org/10.1007/s11605-018-3903-x
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DOI: https://doi.org/10.1007/s11605-018-3903-x