Surgical Outcome Risk Tool (SORT) Calculator

Estimates 30-day mortality after inpatient non-cardiac surgery from six preoperative variables. Includes information buttons, interpretation and a Knowledge Hub clinical guide.

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Surgical Outcome Risk Tool (SORT)
Clinical Decision Tool

Estimates 30-day mortality after inpatient non-cardiac surgery from six preoperative variables.

Enter the clinically verified value.
Enter the clinically verified value.
Enter the clinically verified value.
Enter the clinically verified value.
Enter the clinically verified value.
Enter the clinically verified value.
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Clinical Decision Support Only

MediCalc calculators are intended to support qualified healthcare professionals and must not replace professional clinical judgement. Do not enter patient-identifiable information into Saved Progress.

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Learn More About Surgical Outcome Risk Tool (SORT)
MedicalC Knowledge Hub

Surgical Outcome Risk Tool (SORT): Clinical Guide

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Estimates 30-day mortality after inpatient non-cardiac surgery from six preoperative variables.

Overview

Estimates 30-day mortality after inpatient non-cardiac surgery from six preoperative variables.

Clinical Significance

Result is estimated 30-day mortality percentage in the derivation population.

When to Use

  • Use as decision support when all required inputs are reliable.

How It Is Calculated

  • Logistic SORT equation using ASA grade, cancer, age, urgency, surgical specialty and procedure severity.

Interpretation

  • Result is estimated 30-day mortality percentage in the derivation population.

Worked Example

Enter verified values in the displayed units; MedicalC applies the published equation or point system.

Limitations

  • Prediction models may be miscalibrated outside their derivation population.
  • Measurement and classification error can materially change the result.

Clinical Pearls

  • Document source values and units with the result.
  • Use trends and the full clinical picture.

Common Mistakes

  • Wrong units.
  • Using non-contemporaneous inputs.
  • Treating the output as a diagnosis or mandatory treatment decision.

Frequently Asked Questions

What does this tool calculate?

Estimates 30-day mortality after inpatient non-cardiac surgery from six preoperative variables.

Can the result be used alone?

No. Interpret it with the complete clinical assessment and current guidance.

References

  1. Protopapa KL et al. Br J Surg. 2014;101:1774-1783. — Primary or supporting reference for the implemented model.

Reviewed by: MedicalC Clinical Editorial Team
Last reviewed: July 2026

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Reviewed by: MedicalC Clinical Editorial Team Last reviewed: July 2026

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Clinical Disclaimer

MedicalC calculators and clinical tools are intended to support healthcare professionals. They do not replace clinical judgement, individual patient assessment, local guidance or specialist advice.

Results should always be interpreted in the context of the patient’s history, examination, investigations, current clinical condition and applicable professional guidance.

Reviewed by: MedicalC Clinical Editorial Team Last reviewed: July 2026
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