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.
Incidence rate ratios and their corresponding confidence intervals from the primary analysis were used. CDARS = Clinical Data Analysis and Reporting System; CPRD = Clinical Practice Research Datalink; FQ = fluoroquinolone.
