Surgical Risk Calculator

Bariatric Surgery Morbidity and Mortality Risk Calculators

Two separate calculators for bariatric surgery: 30-day morbidity, then 30-day mortality further down this page.

This tool supports clinical judgment and does not replace it.

Everything is calculated in your browser. Nothing you enter is sent anywhere or saved.

Bariatric surgery morbidity risk

BMI category
Functional status
History of MI or angina A history of Myocardial infarction within 6 months or angina within 1 month of surgery
Hypertension Persistent BP > 140/90 or on anti-hypertensives
History of CVA A history of cerebrovascular accident
History of bleeding disorder A history of having a bleeding disorder

About this model

  • Built from 11,023 patients in the 2007 American College of Surgeons National Surgical Quality Improvement Program (NSQIP) and validated on the 2008 data.
  • 30-day morbidity was 4.2%.
  • C statistic 0.69 in training and 0.66 in validation.

Citation

Gupta PK, Franck C, Miller WJ, Gupta H, Forse RA. Development and validation of a bariatric surgery morbidity risk calculator using the prospective, multicenter NSQIP dataset. J Am Coll Surg. 2011;212(3):301-9. doi:10.1016/j.jamcollsurg.2010.11.003 · PubMed 21247780

Original spreadsheet

Bariatric surgery mortality risk

Age in years, 0 to 110
BMI category
Dyspnea
Corticosteroid use A history of chronic corticosteroid use
Peripheral vascular disease Peripheral vascular disease with previous revascularization or amputation
Previous PCI Previous percutaneous coronary intervention

About this model

  • Built from the 2006–2008 American College of Surgeons National Surgical Quality Improvement Program (NSQIP): 32,889 patients, divided into a training set of 21,891 and a validation set of 10,998.
  • 30-day mortality was 0.14%.
  • C statistic 0.80 in training and 0.82 in validation.

Citation

Ramanan B, Gupta PK, Gupta H, Fang X, Forse RA. Development and validation of a bariatric surgery mortality risk calculator. J Am Coll Surg. 2012;214(6):892-900. doi:10.1016/j.jamcollsurg.2012.02.011 · PubMed 22521443

Original spreadsheet

For questions or comments, please email admin@surgicalriskcalculator.com. Please do not include patient information.