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

  1. How can I transfer output from SDA and R-DAS to a document, spreadsheet, or presentation?
  2. How do I perform a homogeneity test of proportions or percentages in the R-DAS?
  3. How do I produce correct estimates for NSDUH: 4- and 2-Year R-DAS data files?
  4. My results in R-DAS were blocked by the disclosure protection settings. How do I avoid having my output blocked?
  5. My results in R-DAS were blocked by the disclosure protection settings. What do the various messages mean?
  6. What are the differences between NSDUH public-use and restricted-use data?
  7. What is the Restricted-use Data Analysis System (R-DAS)?
  8. Which variables are available in the restricted-use NSDUH data files?