Obesity Surgery Mortality Risk Score: Can we Go Beyond Mortality Prediction?

  • Marta Carvalho S
  • Daniela Pinho M
  • Humberto S Machado C
Citations of this article
Mendeley users who have this article in their library.


Introduction: High morbidity and low mortality has been linked to bariatric surgery. The Obesity surgery mortality risk score (OS-MRS) is a validated scale for mortality risk assessment. The aim of this study was to evaluate if OS-MRS scale can also be used as a predictor of postoperative complications in obese patients submitted to primary laparoscopic gastric bypass. Methods: Retrospective study including all patients submitted to primary laparoscopic gastric bypass between January and December 2014. The OS-MRS scale was applied preoperatively, and postoperative to access morbidity and mortality at 30 and 90 days. Complications were classified according to Clavien-Dindo's grades (I to V). The association between different OSMRS classes and the occurrence of adverse events was analyzed. Results: 85 patients were included and classified as class A (n=33; 38.8%), class B (n=48; 56.5%) and class C (n=4; 4.7%). No mortality cases were registered. The morbidity rate at 30 days was 23.5% (n=20), and 25.9% at 90 days (n=22). The complications rate in each of OS-MRS subgroups, was 9.1% in class A (both at 30 and 90 days), 31.3% and 35.4% in class B (at 30 and 90 days respectively), and 50% in class C (both at 30 and 90 days). There was a statistically significant independent relationship between OS-MRS scale, ASA physical status and the risk of developing pulmonary embolism, both at 30 and 90 postoperative days. Patients from classes B and C showed a greater risk of complications when compared to class A (at 30 days, OR 4.9, 95% IC: 1.3-18.2; p=0.019 and at 90 days, OR 5.8, 95% IC: 1.5-21.4; p=0.009). Conclusion: There is increasing evidence that OS-MRS scale is a useful tool to predict morbidity after gastric laparoscopic bypass in morbidly obese patients.




Marta Carvalho, S. P., Daniela Pinho, M. S., & Humberto S Machado, C. C. (2015). Obesity Surgery Mortality Risk Score: Can we Go Beyond Mortality Prediction? Journal of Anesthesia & Clinical Research, 06(09). https://doi.org/10.4172/2155-6148.1000562

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free