Restricted-use Data Analysis System
(R-DAS)

The R-DAS is an online analysis system that allows researchers to produce tables using restricted-use data files. Currently, the following files are available for analysis in the R-DAS (?): NSDUH 8-Year R-DAS File (2002 to 2009) More on Study Scope, Description, and Methodology Online Analysis: R-DAS Note: To correctly generate estimates, please review the FAQ on "How do I produce correct estimates for NSDUH: 4- and 2-Year R-DAS data files?". Documentation: Codebook - pdf, Questionnaire - pdf (screener), Questionnaire - pdf (showcards), Questionnaire - pdf (specifications) , Codebook - html* NSDUH 4-Year R-DAS File (2002 to 2005 and 2006 to 2009) More on Study Scope, Description, and Methodology Online Analysis: R-DAS Note: To correctly generate estimates, please review the FAQ on "How do I produce correct estimates for NSDUH: 4- and 2-Year R-DAS data files?". Documentation: Codebook - pdf, Questionnaire - pdf (screener), Questionnaire - pdf (showcards), Questionnaire - pdf (specifications) , Codebook - html* NSDUH 2-Year R-DAS File (2002 to 2003, 2004 to 2005, 2006 to 2007, 2008 to 2009, and 2010 to 2011) More on Study Scope, Description, and Methodology Online Analysis: R-DAS Note: To correctly generate estimates, please review the FAQ on "How do I produce correct estimates for NSDUH: 4- and 2-Year R-DAS data files?". Documentation: Codebook - pdf, Questionnaire - pdf (screener), Questionnaire - pdf (showcards), Questionnaire - pdf (specifications) , Codebook - html*

• To access the R-DAS, users are required to login using either a MyData, Google, or Facebook account. The following links are available for MyData:

  • Create a new MyData account
  • Manage your MyData Account
  • Reset your password

• The Restricted-use variable crosswalk displays all variables in the restricted-use NSDUH data files and their availability for specific groups of years.

• FAQs: Help with the Restricted-use Data Analysis System (R-DAS)

*Details on the structure of the data files in the R-DAS, including file contents, weights and other information, can be found on the study home page for each study.