State Inpatient Databases
The State Inpatient Databases (SID) are one in a family of databases and software tools developed as part of the Healthcare Cost and Utilization Project (HCUP). A Federal-State-Industry partnership sponsored by the Agency for Healthcare Research and Quality, HCUP data inform decision making at the national, State, and community levels. This page provides an overview of the SID. For more details, see Introduction to the SID (PDF file, 181 KB; HTML).
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The State Inpatient Databases (SID) are a powerful set of hospital databases from data organizations in participating States.
The SID exclude data elements that could directly or indirectly identify individuals. Purchase of the files is open to all users who sign a Data Use Agreement (PDF file, 54 KB; HTML). Users must agree to use the database for research and statistical purposes only and to make no attempts to identify individuals. Identities of institutions are available only in States where data sources already make that information public or agree to its release. For these institutions and for research purposes only, linkage is possible to data from the American Hospital Association (AHA) Annual Survey Database (Health Forum, LLC © 2012). Select for Introduction to the SID (PDF file, 181 KB; HTML). |
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The SID contain more than 100 clinical and nonclinical variables included in a hospital discharge abstract, such as:
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Forty Six States now participate in the SID (Select to access contact information for the participating data organization in these States): Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Hawaii, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Vermont, Washington, West Virginia, Wisconsin, and Wyoming. A number of States make SID files available for purchase through the HCUP Central Distributor. |
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The SID are well suited for research that requires complete enumeration of hospitals and discharges within market areas or States. Researchers and policymakers use SID to investigate questions unique to one State; to compare data from two or more States; to conduct market area research or small area variation analyses; and to identify State-specific trends in inpatient care utilization, access, charges, and outcomes. Recent studies using the SID include:
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The SID data set can be run on desktop computers with a CD-ROM reader, and comes in ASCII format. The data on the CD set require a statistical software package such as SAS or SPSS to use for analytic purposes. The data set comes with full documentation. SAS and SPSS users are provided programs for converting ASCII files. |
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SID files beginning in 1990 are available through the AHRQ-sponsored HCUP Central Distributor. The HCUP Central Distributor can provide more detailed, descriptive information on the SID and assist purchasers in completing the application. |
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For answers to commonly asked questions regarding HCUP databases and tools, please review the HCUP Index Page. If you cannot find an answer to your question, please contact HCUP User Support Staff. To reach HCUP User Support, please contact us by e-mail or phone:
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Internet Citation: HCUP Databases. Healthcare Cost and Utilization Project (HCUP). January 2013. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/sidoverview.jsp. |
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If you have comments, suggestions, and/or questions, please contact hcup@ahrq.gov. |
Last modified 1/15/13 |