Figure 2. Hospital-Level Correlation of Log-Transformed Odds Ratios (ORs) Between Use of Any Postoperative Surgical Antimicrobial Prophylaxis and Surgical Site Infection (SSI).

SSI ORs were adjusted for differences in procedure mix, patient characteristics, and comorbidity profiles, while prophylaxis-use ORs accounted for clinically related procedure groups.

^aThe log transformation of ORs was used to meet assumptions of normality.