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.
Timeline of traditional surveillance, Shewhart statistical process control (SPC), and exponentially weighted moving average (EWMA) SPC detection of 10 historic surgical site infection (SSI) outbreaks. SSI outbreaks occurred in the Duke Infection Control Outreach Network (DICON) from 2003 to 2013. *Outbreaks 8 and 10 were not detected by Shewhart or EWMA SPC charts. †Adjacent bars indicate that detection occurred during the same month.
