Surgery · Bariatric Surgery
Obesity Surgery Mortality Risk Score (OS-MRS) calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
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0
OS-MRS class A (0–1)
Band: OS-MRS class A (0–1)
Interpretation. OS-MRS class A (0–1)
Suggested management. Lowest mortality risk class in DeMaria derivation/validation.
Obesity Surgery Mortality Risk Score (OS-MRS): 0 — OS-MRS class A (0–1). Interpretation: OS-MRS class A (0–1) What to do: Lowest mortality risk class in DeMaria derivation/validation. Inputs: BMI ≥50 kg/m²: false; Male sex: false; Hypertension: false; Pulmonary embolism risk (prior VTE/PE, IVC filter, right heart failure, or obesity hypoventilation): false; Age ≥45 years: false Source: DeMaria EJ et al. Obesity surgery mortality risk score: proposal for a clinically useful score to predict mortality risk in patients undergoing gastric bypass. Surg Obes Relat Dis. DOI: 10.1016/j.soard.2007.01.006. PMID: 17386394. Scope: one point each for BMI ≥50, male sex, hypertension, pulmonary embolism risk composite, and age ≥45; class A 0–1, B 2–3, C 4–5. (2007)
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Clinical inputs
- BMI ≥50 kg/m²
- Male sex
- Hypertension
- Pulmonary embolism risk (prior VTE/PE, IVC filter, right heart failure, or obesity hypoventilation)
- Age ≥45 years
Primary source
DeMaria EJ et al. Obesity surgery mortality risk score: proposal for a clinically useful score to predict mortality risk in patients undergoing gastric bypass. Surg Obes Relat Dis. DOI: 10.1016/j.soard.2007.01.006. PMID: 17386394. Scope: one point each for BMI ≥50, male sex, hypertension, pulmonary embolism risk composite, and age ≥45; class A 0–1, B 2–3, C 4–5. (2007)
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