NSDUH Frequently Asked Questions
Why is it that sometimes the estimate for a group is suppressed while the estimate of a smaller subgroup is not suppressed? For example, the estimate for all Hispanics is suppressed while the estimate for male Hispanics is published.
How do I recode variables when using the Public-use Data Analysis System (PDAS) or Restricted-use Data Analysis System (RDAS)?
What questions were administered related to the Coronavirus 2019 pandemic? When were they added to NSDUH?
When did NSDUH make the change from DSM-IV to DSM-5 for assessing mental health and substance use disorder?
How far back can I compare recent estimates for Any Mental Illness (AMI) and Serious Mental Illness (SMI)?
In 2020, why did the number of people with substance use disorder (SUD) and alcohol use disorder (AUD) both double?
Does the 2015 break in the methamphetamine use trend reflect a real change or is it due to methodological changes?
When NSDUH tables indicate that a certain number of people had a substance use disorder (SUD) in the past year, what does the "past year" include?
How were the pain reliever questions asked if a respondent indicated that they used multiple types of pain relievers?
The NSDUH questionnaire asks the reasons why a person did not get treatment or counseling across three questions. The subsequent questions were only shown if the respondent indicated that they had “some other reason or reasons” on the first question. If they were never shown the subsequent questions, how were their answers coded in the data?