Figure 3.
Ottawa. ORs with their 95% CIs. (a) Controls ± 3 days. (b) Controls [−6, 6].
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.