National Emergency Laparotomy Audit (NELA) Risk Calculator
Portsmouth Physiological and Operative Severity Score for the Enumeration of Mortality and Morbidity (P-POSSUM)
ACS National Surgical Quality Improvement Program (NSQIP) Surgical Risk Calculator
Nottingham Hip Fracture Score
Subarachnoid Hemorrhage International Trialists (SAHIT)
Risk of mortality and unfavourable outcome for subarachnoid haemorrhage.
Modified Caprini risk assessment model for VTE in general surgical patients