PDAS is the online analysis tool for SAMHDA studies. This tool allows users to review study variables, run crosstab analyses, perform logistic regressions, and download the results of any analysis to CSV format.
RDAS is a user-friendly application for online analyses to create and output crosstabs and perform logistic regression from your web browser. However, RDAS is populated with restricted-use data—including certain geographic identifiers, like state—that pass built-in confidentiality restraints. Only NSDUH data are available in this initial release. With RDAS, you can see values by state over time, with data from 2004 to 2016. You will have access to the same visualizations as PDAS, in addition to crosstabs.
Interactive NSDUH State Estimates (or Small Area Estimates (SAES)) allows users to review historic NSDUH Small Area Estimates, create US maps and trend graphs, and download data in CSV format.