Table 2:

Predictive Model for OS-SSI Development

Variable	Odds Ratio [95% CI]
Delayed-closure laparotomy (DCL)	4.67 [2.58 – 8.44]
Colon resection	3.34 [1.53 – 6.85]
Mechanism of injury (penetrating versus blunt)*	1.62 [0.94 – 3.29]
Small bowel resection	1.61 [0.95 – 3.13]
Open colon injury	1.42 [0.85 – 3.33]
Red blood cell transfusion (units)	1.26 [0.97 – 1.71]
Base excess	1.20 [0.98 – 1.85]
Surgery Duration (minutes)	1.20 [0.96 – 1.57]
Sex (female is reference category)	1.17 [0.81 – 2.12]
Open small bowel injury	1.12 [0.71 – 2.08]
Age (years)	1.09 [0.91 – 1.39]
Wound class	1.05 [0.78 – 1.47]
emperature (degrees Fahrenheit)	0.99 [0.77 – 1.28]
Body Mass Index (BMI)	0.94 [0.74 – 1.12]
Race/Ethnicity = White (reference race)	-
Race/Ethnicity = Black	0.99 [0.65 – 1.45]
Race/Ethnicity = Hispanic	1.07 [0.78 – 1.66]
Race/Ethnicity = Other	0.91 [0.35 – 1.74]
Area under the curve (AUC)	0.78 [0.71 – 0.85]
Intercept	0.03 [0.02 – 0.07]

^*blunt is the reference category