Restricted-use Data Analysis System
R-DAS is an online analysis system that allows researchers to produce tables using restricted-use data files. The data files currently available for analysis in the R-DAS are listed in the expandable menu, below. Click on a colored bar to open the menu for a R-DAS study of interest. The menu provides access to the study home page, study documentation, and the R-DAS. The Restricted-use variable crosswalk displays all variables in the restricted-use NSDUH data files and their availability for specific groups of years.