Figure 4.
Severity of dental caries in Taiwan, 2000–2012 (p-value for trend test, <0.001 (all groups)).
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.