Criteria fulfillment of each evaluated risk stratification tool
| Risk stratification tool | Criteria 1 | Criteria 2 | Criteria 3 | Criteria 4 | Criteria 5 | Criteria 6 |
| ASA-PS | X | X | X | X | ||
| ACS-NSQIP Universal Surgical Risk Calculator | X | X | X | X | X | |
| CCI | X | X | X | X | X | |
| ESAS | X | X | X | X | ||
| PESAS | X | X | X | X | ||
| POSSUM | X | X | ||||
| PMRS | X | X | ||||
| SAS | X | X | ||||
| SMS | X | |||||
| SORT | X | X | X | |||
| Surgical Risk Scale | X | |||||
| Surgical Risk Score | X | |||||
| Track and Trigger Systems | X | X | X | X |
Refer to criteria as listed in the ’Introduction' section.
ASA-PS, American Society of Anesthesiologists Physical Status Grading; CCI, Charlson Comorbidity Index; ESAS, Emergency Surgery Acuity Score; PESAS, Physiological Emergency Surgery Acuity Score; POSSUM, Physiological and Operative Severity Score for the Enumeration of Mortality and Morbidity; PMRS, Perioperative Mortality Risk Score; SAS, Surgical Apgar Score; SMS, Surgical Mortality Score; SORT, Surgical Outcome Risk Tool.