2016-2018 NSDUH Substate Region Shapefile
Description and Downloading Instructions

This shapefile includes geographic boundaries of the 2016-2018 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 System (GIS) software. This shapefile was used to create the "2016-2018 NSDUH National Maps of Prevalence Estimates" document at https://www.samhsa.gov/data/.

Shapefile Components

The shapefile includes the following components:

To access these shapefile components, click the archived file to download them.

Description of Shapefile Fields

The fields in the shapefile are as follows:

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

  1. The 2016-2018 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 five 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 32 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:

ST_FIPS=01, ST_NAME=Alabama, SR_NAME=Region 1, REG_FIP=Region 1_01, ST=AL, ABODALC=4.4, ABODALC_GP=2, ABODALC_LO=4.13, ABODALC_UP=4.61, …, UBNGDRK=10.13, UBNGDRK_GP=3, UBNGDRK_LO=9.11, UBNGDRK_UP=10.68

These shapefile values can be interpreted as follows:

Go to Top of Page