Table 4.

Comparative Summary of Logistic Regression Models for Incidence of Superficial Incisional Surgical Site Infection

Model	Variables	Omnibus tests of model coefficients* (p value)	AUC
1	Normalized Subcutaneous Fat (per 10% increase)	0.023	0.60 ± 0.044
2	BMI	0.73	0.52 ± 0.039
3	ASA, smoking, steroid use, incision-to-close operative time (h), normalized subcutaneous fat	< 0.001	0.69 ± 0.036
4	ASA, smoking, steroid use, incision-to-close operative time (h), BMI	0.002	0.68 ± 0.041

^*The Omnibus tests of model coefficients provide an absolute measure of model validity by testing the predictive ability of all covariates in the model compared to a constant-only model