2008-2010 NSDUH Substate Region Shapefile1
Description and Downloading Instructions

Revised Mental Illness Estimates: The Substance Abuse and Mental Health Services Administration (SAMHSA) has been publishing substate estimates of the prevalence of past year serious mental illness (SMI) and any mental illness (AMI) among adults aged 18 or older since the release of the 2008-2010 substate small area estimation (SAE) report. Estimates were based on a model developed in 2008. In 2013, SAMHSA developed a more accurate model for the 2012 data. This revised model incorporates the NSDUH respondent's age and indicators of past year suicide thoughts and depression, along with the variables that were specified in the 2008 model (Kessler-6 [K6] questions on psychological distress and an abbreviated set of questions on impairment in carrying out activities from the World Health Organization Disability Assessment Schedule [WHODAS]), leading to more accurate estimates of SMI and AMI. The SMI and AMI SAEs shown in this shapefile have been revised based on the new model. Other mental health measures in these tables, such as major depressive episode (MDE) and serious thoughts of suicide, were not affected. For further information on the revised model, see the NSDUH short report titled Revised Estimates of Mental Illness from the National Survey on Drug Use and Health at http://samhsa.gov/data/default.aspx.

This shapefile includes geographic boundaries of the 2008-2010 National Survey on Drug Use and Health (NSDUH) substate regions along with small area estimation (SAE) values (prevalence rates, the map group, and the upper and lower bounds found in the map legends) related to each substate region. It can be used for analysis and data display with Geographic Information Systems (GIS) software.

Shapefile Components

The shapefile includes the following components:

To download the shapefile components listed above, click here for an archived file.

Description of Shapefile Fields

The fields in the shapefile are as follows:

For each outcome, there are four variables on the file:

  1. The 2008-2010 small area estimate value is noted by the outcome name (listed below).
  2. The map group for each outcome variable is shown with the outcome name followed by "_GP." Its values are 1,…,7, where 1 represents low prevalence and 7 represents high prevalence, except for the three perception of great risk variables, where 1 represents high prevalence and 7 represents low prevalence.
  3. The lower bound of the map group is shown with the outcome name followed by "_LO." If a substate region is in map group 3 for a particular outcome, the lower bound shown would be the lower bound given in the map legend for group 3.
  4. The upper bound of the map group is shown with the outcome name followed by "_UP." If a substate region is in map group 3, the upper bound shown would be the upper bound given in the map legend for group 3.

The 27 outcome variables, shown as "outcome name: outcome description (age group)," are as follows:

Shapefile Values for a Substate Region: An Example

As an example of an observation in the shapefile, Region 1 in Alabama would have the following values:

REG_FIP=Region 1_01, ST_FIPS=01, ST_NAME=Alabama, SR_NAME=Region 1, ABODALC=6.22, ABODALC_GP=3, ABODALC_LO=6.22, ABODALC_UP=6.87, …, RISKMJ=40.85, RISKMJ_GP=3, RISKMJ_LO=37.06, RISKMJ_UP=40.85

End Notes

1Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2008, 2009, and 2010 (Revised March 2012; SMI and AMI Estimates Revised October 2013)

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