About the ACS Risk Calculator

The goal of the ACS NSQIP risk calculator is to provide accurate, patient-specific risk information to guide both surgical decision-making and informed consent. The risk calculator uses 21 patient predictors (e.g., age, ASA class, BMI, HTN) and the planned procedure (CPT code) to predict the chance that patients will have any of 9 different outcomes within 30-days following surgery. The outcomes include:

  • Death
  • Any complication (superficial incisional SSI, deep incisional SSI, organ space SSI, wound disruption, pneumonia, unplanned intubation, PE, ventilator > 48 hours, progressive renal insufficiency, acute renal failure, UTI, stroke, cardiac arrest, myocardial infarction, DVT, systemic sepsis)
  • Serious complication (death, cardiac arrest, myocardial infarction, pneumonia, progressive renal insufficiency, acute renal failure, PE, DVT, return to the operating room, deep incisional SSI, organ space SSI, systemic sepsis, unplanned intubation, UTI, wound disruption)
  • Pneumonia
  • Cardiac event (cardiac arrest or MI)
  • Surgical site infection (SSI)
  • Urinary tract infection (UTI)
  • Venous thromboembolism (VTE)
  • Renal failure (progressive renal insufficiency or acute renal failure)

The risk calculator was built using data collected from > 1.4 million operations from 393 hospitals participating in ACS NSQIP from 2009-12. Entering the most complete and accurate patient information will provide the most precise risk information. However, the estimates can still be calculated if some of the patient information is unknown. Detailed information regarding ACS NSQIP methodology and risk calculator modeling can be found here:

ACS NSQIP Risk Calculator publications

The risk calculator has been prominently mentioned in the news media. Links to the articles can be found here:

Risk Calculator in the Media