Table 1.

ACS NSQIP Variables used in the Universal and Colon-Specific Surgical Risk Calculators

Variable	Categories	Colon-Specific	Universal
Age group, y	<65, 65-74, 75-84, >=85	✓	✓
Sex	Male, female	✓	✓
Functional status	Independent, partially dependent, totally dependent	✓	✓
Emergency case	Yes, no	✓	✓
ASA Class	1 or 2, 3, 4 or 5	✓	✓
Steroid use for chronic condition	Yes, no	✓	✓
Ascites within 30 d preoperatively	Yes, no	✓	✓
System sepsis within 48 h preoperatively	None, SIRS, sepsis, septic shock	✓	✓
Ventilator dependent	Yes, no	✓	✓
Disseminated cancer	Yes, no	✓	✓
Diabetes	No, Oral, Insulin	✓	✓
Hypertension requiring medication	Yes, no	✓	✓
Previous cardiac event	Yes, no	✓	✓
Congestive heart failure in 30 d preoperatively	Yes, no	✓	✓
Dyspnea	Yes, no	✓	✓
Current smoker within 1 y	Yes, no	✓	✓
History of COPD	Yes, no	✓	✓
Dialysis	Yes, no	✓	✓
Acute renal failure	Yes, no	✓	✓
BMI Class	Underweight, normal, overweight, obese 1, obese 2, obese 3	✓	✓
Colon surgery group (colectomy)	Partial lap with anastomosis, partial lap with ostomy, partial open with anastomosis, partial open with ostomy, total lap with ostomy, total open with ostomy	✓
Indication for colon surgery	Diverticulitis, enteritis/colitis, hemorrhage, neoplasm, obstruction/perforation, vascular insufficiency, volvulus, other	✓
CPT-specific linear risk	2,805 values		✓