Obesity Surgery

, Volume 19, Issue 9, pp 1228–1235 | Cite as

Mortality and Hospital Stay After Bariatric Surgery in 2,167 Patients: Influence of the Surgeon Expertise

  • Silvana Márcia Bruschi KellesEmail author
  • Sandhi Maria Barreto
  • Henrique Leonardo Guerra
Research Clinical



Postoperative mortality is a rare event after bariatric surgery. The main goal of this study was to calculate the 30-day mortality rate postbariatric “open” surgery and the length of hospital stay of patients assisted by a health maintenance organization in Brazil. We also investigate their association with sex, age, BMI, preexisting comorbidities, and volume of procedures performed by surgeons.


A total of 2,167 patients who underwent RYGB between 01/2004 and 12/2007 were analyzed. The deaths and hospital stay were identified in the healthcare transactional database and the morbidity data in the preoperative medical audit records. Factors contributing to adverse outcomes were determined by multiple logistic regression analysis.


The overall mortality rate was 0.64%, with a decreasing trend over the years. The median hospital stay was 3.1 days. In the multivariate analysis, both mortality and longer hospital stay were positively and significantly associated with age > 50 years, BMI > 50 kg/m2, and surgeon volume of less than 20 bariatric surgeries/year. Presence of hypertension also increased the risk of longer hospital stay. Multivariate analysis showed that the 30-day mortality was six times higher in patients operated by professionals who performed less surgeries/year and longer hospital stay, four times more frequent.


The 30-day mortality post-RYGB is similar to the rates found in developed countries and much lower than the rates found for patients assisted by the public health system in Brazil. In addition to age and clinical factors, the results suggest that mortality and longer hospital stay are strong and inversely related to surgeon’s experience.


Morbid obesity Morbidity Mortality Private health insurance Roux-en-Y gastric bypass Hospital length stay Surgeon’s expertise 30-Day cause of death 



The authors thank Unimed-BH for the data base and assistance.

Conflict of interest

The authors have nothing to disclose regarding any commercial interest in the subject of study.


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Copyright information

© Springer Science + Business Media, LLC 2009

Authors and Affiliations

  • Silvana Márcia Bruschi Kelles
    • 1
    Email author
  • Sandhi Maria Barreto
    • 1
  • Henrique Leonardo Guerra
    • 1
  1. 1.Program of Post-graduation on Adults Health in the Faculty of MedicineFederal University of Minas GeraisBelo HorizonteBrazil

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