Click here to access the public release of the NCS-R dataset

Click here to access the public release of the NCS-A dataset

NCS-2 data: SAMHDA no longer has funding to provide  the restricted release of studies not primarily funded by SAMHSA, and as a result the restricted release of the NCS-2 is no longer available. The ICPSR General Archive is currently reviewing the NCS-2 to see if the ICPSR General Archive will be able to provide a restricted release of the NCS-2 in the near future.  We will updated this site as soon as we have a decision from the ICPSR General Archive.

The baseline NCS, fielded from the fall of 1990 to the spring of 1992, was the first nationally representative mental health survey in the U.S. to use a fully structured research diagnostic interview to assess the prevalences and correlates of DSM-III-R disorders. The baseline NCS respondents were reinterviewed in 2001-02 (NCS-2) to study patterns and predictors of the course of mental and substance use disorders and to evaluate the effects of primary mental disorders in predicting the onset and course of secondary substance disorders. In conjunction with this, an NCS Replication survey (NCS-R) was carried out in a new national sample of 10,000 respondents. The goals of the NCS-R are to study trends in a wide range of variables assessed in the baseline NCS and to obtain more information about a number of topics either not covered in the baseline NCS or covered in less depth than we currently desire. A survey of 10,000 adolescents (NCS-A) was carried out in parallel with the NCS-R and NCS-2 surveys. The goal of NCS-A is to produce nationally representative data on the prevalences and correlates of mental disorders among youth. The NCS-R and NCS-A, finally, are being replicated in a number of countries around the world. Centralized cross-national analysis of these surveys is being carried out by the NCS data analysis team under the auspices of the World Health Organization (WHO) World Mental Health Survey Initiative.

In order to provide an easily accessible database which can be updated and checked on a regular basis, we have created a public use file system containing all the documents from the NCS and NCS-R programs. These file systems can be accessed through the Internet and either downloaded onto a disk or printed. We will update the system on a regular basis to add newly completed paper abstracts and other documents. In addition, the NCS and NCS-R data can be accessed through ICPSR (Inter-university Consortium for Political and Social Research). Any updates to the data to correct coding or classification errors will be made available along with written documentation of the changes in ICPSR's quarterly newsletter.

NCS-R Lifetime prevalence estimates

NCS-R Twelve-month prevalence estimates

NCS-A Lifetime and 12M prevalence estimates