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.
This detailed manual was used as a training guide for the Field Interviewers (FIs) who conducted the in-person 2021 National Survey on Drug Use and Health (NSDUH). It covers the information...
data.gov
An official website of the GSA's Technology Transformation Services