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    • 2018-2020 NSDUH Substate Region Estimates By Age Group

    Metadata Updated: September 6, 2025

    Substate estimates for these years are no longer available due to methodological concerns with combining 2020 data with data from 2018 and 2019. We apologize for any inconvenience or confusion this may cause.Because of the COVID-19 pandemic, most respondents answered the survey via the web in Quarter 4 of 2020, even though all responses in Quarter 1 were from in-person interviews. It is known that people may respond to the survey differently while taking it online, thus introducing what is called a mode effect.When the state estimates were released, it was assumed that the mode effect was similar for different groups of people. However, later analyses have shown that this assumption should not be made. Because of these analyses, along with concerns about the rapid societal changes in 2020, it was determined that averages across the three years could be misleading.For more detail on this decision, see the 2018-2020substate data page.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date July 24, 2025
    Metadata Updated Date September 6, 2025

    Metadata Source

    Harvested from Healthdata.gov

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date July 24, 2025
    Metadata Updated Date September 6, 2025
    Publisher Substance Abuse and Mental Health Services Administration
    Maintainer
    Identifier https://healthdata.gov/api/views/7aq4-c6d4
    Data First Published 2025-07-14
    Data Last Modified 2025-09-06
    Category SAMHSA
    Public Access Level public
    Bureau Code 009:30
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://healthdata.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 9f259ac9-b846-453a-8e1e-e70c9481e477
    Harvest Source Id 651e43b2-321c-4e4c-b86a-835cfc342cb0
    Harvest Source Title Healthdata.gov
    Homepage URL https://healthdata.gov/d/7aq4-c6d4
    Program Code 009:061
    Source Datajson Identifier True
    Source Hash 95db7e9d50f9f1294756542bd3296bb942c7b72684b2c2a5ccb32ecad5d5851e
    Source Schema Version 1.1

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