Figure 1.
Flow diagram of eligible study participants from NHANES 2011–2012
Prevalence estimates cannot be obtained from the flow diagram because is does not account for weighted survey design
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.