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.
The relationship between number of substances used and risk for undetermined suicide. Heroin overdoses excluded. Percent of all undetermined suicides. (4 and 5 substances included together as there was only one person, an undetermined suicide, who had used 5 substances.)
