Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
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.
