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Users have the choice to include or exclude non-response codes using the RDAS system and send this information to the R statistical calculation server.
Previously, SAMHSA treated all missing, logically assigned, and non-response categories as missing, excluding these categories from the result set. Now, categories explicitly labeled as missing (e.g., "." in the NSDUH datasets) are excluded from the crosstab, and all other categories are included in the crosstab.
Three annual reports for the 2017 NSDUH are available at: https://www.samhsa.gov/data/nsduh/reports-detailed-tables-2017-NSDUH
- 2017 Key Substance Use and Mental Health Indicators Report
- 2017 NSDUH Detailed Tables
- 2017 Methodological Summary and Definitions Report
SAMHSA has partnered with the National Center for Health Statistics (NCHS) to host restricted-use National Survey on Drug Use and Health (NSDUH) data at their Federal Statistical Research Data Centers (RDCs). RDCs are secure facilities that provide access to a range of restricted-use microdata for statistical purposes. SAMHSA is the most recent federal partner to work with NCHS in making NSDUH restricted-use microdata available to approved researchers at RDC sites.