Overview of the State Emergency Department Databases (SEDD)
The State Emergency Department Databases (SEDD) are part of the family of databases and software tools developed for the Healthcare Cost and Utilization Project (HCUP). The SEDD capture emergency visits at hospital-owned emergency departments (EDs) that do not result in hospitalization. Information about patients initially seen in the ED and then admitted to the hospital is included in the State Inpatient Databases (SID). The SEDD files include all patients, regardless of payer, providing a unique view of ED care in a State or in a defined market over time.
Developed through a Federal-State-Industry partnership sponsored by the Agency for Healthcare Research and Quality (AHRQ), HCUP data inform decision making at the national, State, and community levels. This page provides an overview of the SEDD. For more details, see SEDD Database Documentation and the Introduction to the SEDD (PDF file, 446 KB; HTML) Contents:
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The SEDD capture discharge information on all ED visits in a given State that do not result in an admission. States make their SEDD files available for purchase through the HCUP Central Distributor. See Availability of HCUP Data for a list of State database participation and availability by year. Forty-two States currently participate in the SEDD:
Additional information on the SEDD may be found in the Introduction to the SEDD (PDF file, 446 KB; HTML). |
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The SEDD contain clinical and resource-use information that is included in a typical discharge abstract, with safeguards to protect the privacy of individual patients, physicians, and hospitals (as required by data sources). The SEDD contain more than 100 clinical and non-clinical variables included in a hospital discharge abstract, such as:
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The SEDD are calendar year files based on discharge date for all data years except 2015. Because of the transition to ICD-10-CM/PCS on October 1, 2015, the 2015 SEDD are split into two parts. Nine months of the 2015 data with ICD-9-CM codes (discharges from Jan 1, 2015 - September 30, 2015) are in one set of files labeled Q1Q3. Three months of 2015 data with ICD-10-CM/PCS codes (discharges from October 1, 2015 - December 31, 2015) are in a separate set of files labeled Q4. More information about the changes to the HCUP databases for ICD-10-CM/PCS and use of data across the two coding system may be found on the HCUP-US website under ICD-10-CM/PCS Resources. Return to Contents |
The SEDD combined with SID discharges that originate in the ED are well suited for research that requires complete enumeration of hospital-owned EDs within market areas or States. The SEDD promote comparative studies of healthcare services and support healthcare policy research on a variety of topics, including:
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SEDD releases beginning in data year 1999 are available for purchase through the HCUP Central Distributor. Costs vary by State and data year. All HCUP data users, including data purchasers and collaborators, must complete the online HCUP Data Use Agreement Training Tool, and must read and sign the Data Use Agreement for State Databases (PDF file, 251 KB; HTML). The SEDD are available for purchase online through the HCUP Central Distributor. Questions regarding purchasing databases can be directed to the HCUP Central Distributor:
E-mail: HCUP@AHRQ.gov
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The SEDD data set comes in ASCII format and can be run on desktop computers with a DVD drive. To load and analyze the SEDD, you will need the following:
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Internet Citation: HCUP Databases. Healthcare Cost and Utilization Project (HCUP). September 2021. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/seddoverview.jsp. |
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Last modified 9/15/21 |