National Addiction & HIV Data Archive Program



Many questions can be answered by our FAQs or video tutorials that are available 24 hours a day, 7 days a week.


The Find and Apply for Restricted Data Using the IDARS System tutorial provides step by step instructions on accessing and using the ICPSR Data Agreement Request System (IDARS). The tutorial includes answers to many frequently asked questions that NAHDAP has encountered.

Video Presentations

ICPSR has a number of video presentations on YouTube that address a variety of topics including an overview of NAHDAP, creating a MyData account, and step by step instructions on using and troubleshooting setup files for the SAS, SPSS, and Stata statistical packages.


You may encounter unfamiliar acronyms and specialized terms used in the social sciences. These resources can provide clear definitions: