Substantial Decrease in Comorbidity 5 Years After Gastric Bypass: A Population-based Study From the Scandinavian Obesity Surgery Registry

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OBJECTIVE:: To evaluate effect on comorbid disease and weight loss 5 years after Roux-en-Y gastric bypass (RYGB) surgery for morbid obesity in a large nationwide cohort. BACKGROUND:: The number patients having surgical procedures to treat obesity and obesity-related disease are increasing. Yet, population-based, long-term outcome studies are few. METHODS:: Data on 26,119 individuals [75.8% women, 41.0 years, and body mass index (BMI) 42.8?kg/m] undergoing primary RYGB between May 1, 2007 and June 30, 2012, were collected from 2 Swedish quality registries: Scandinavian Obesity Surgery Registry and the Prescribed Drug Registry. Weight, remission of type 2 diabetes mellitus, hypertension, dyslipidemia, depression, and sleep apnea, and changes in corresponding laboratory data were studied. Five-year follow-up was 100% (9774 eligible individuals) for comorbid diseases. RESULTS:: BMI decreased from 42.8?±?5.5 to 31.2?±?5.5?kg/m at 5 years, corresponding to 27.7% reduction in total body weight. Prevalence of type 2 diabetes mellitus (15.5%–5.9%), hypertension (29.7%–19.5%), dyslipidemia (14.0%–6.8%), and sleep apnea (9.6%–2.6%) was reduced. Greater weight loss was a positive prognostic factor, whereas increasing age or BMI at baseline was a negative prognostic factor for remission. The use of antidepressants increased (24.1%–27.5%). Laboratory status was improved, for example, fasting glucose and glycated hemoglobin decreased from 6.1 to 5.4?mmol/mol and 41.8% to 37.7%, respectively. CONCLUSIONS:: In this nationwide study, gastric bypass resulted in large improvements in obesity-related comorbid disease and sustained weight loss over a 5-year period. The increased use of antidepressants warrants further investigation.


  • Magnus Sundbom
  • Jakob Hedberg
  • Richard Marsk
  • Lars Boman
  • Ami Bylund
  • Jan Hedenbro
  • Anna Laurenius
  • Göran Lundegårdh
  • Peter Möller
  • Torsten Olbers
  • Johan Ottosson
  • Ingmar Näslund
  • Erik Näslund
External organisations
  • Uppsala University
  • Karolinska Institutet
  • Aleris Obesitas Skåne
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Gastroenterology and Hepatology
  • Endocrinology and Diabetes
Original languageEnglish
Pages (from-to)1166-1171
JournalAnnals of Surgery
Issue number6
Early online date2016 Jul 15
Publication statusPublished - 2017
Publication categoryResearch

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