Restricted-use Data Analysis System
R-DAS is an online analysis system that allows researchers to produce tables using restricted-use data files. Data files currently available for analysis in the R-DAS are listed below. Data file contents, weights, and other information can be accessed by expanding an R-DAS study of interest and clicking on "More on Study Scope, Description, and Methodology." The Restricted-use variable crosswalk displays all variables in the restricted-use NSDUH data files and their availability for specific groups of years.