2012 Kids’ Inpatient Database (KID) Now Available
The Kids’ Inpatient Database (KID), featuring 2012 data, has been released by AHRQ’s Healthcare Cost and Utilization Project (HCUP). The KID is the only all-payer dataset in the United States designed specifically to study hospital use, charges and outcomes in the population of patients younger than 21. It has been released every three years since the 1997 data year. The new KID includes data from approximately 3 million pediatric discharges from 44 states. Weighted, it estimates roughly 7 million hospitalizations. Researchers and policymakers can use the data to identify, track and analyze national trends in pediatric health care. The sample design of the KID enables analyses of rare conditions, such as congenital anomalies, and uncommon treatments, such as organ transplantation. The 2012 KID can be purchased through the HCUP Central Distributor, and statistics can be accessed via HCUPnet, a free, online query system. Additional information on the KID is available on the HCUP-US website.
The Kids' Inpatient Database
The Kids' Inpatient Database (KID) is part of a family of databases and software tools developed for the Healthcare Cost and Utilization Project (HCUP). HCUP inpatient data are based on administrative data—discharge abstracts created by hospitals for billing. The KID is the largest publicly-available all-payer pediatric inpatient care database in the United States. Unweighted, it contains data from approximately 3 million pediatric discharges each year. Weighted, it estimates roughly 7 million hospitalizations.
Developed through a Federal-State-Industry partnership sponsored by the Agency for Healthcare Research and Quality, HCUP data inform decisionmaking at the national, State, and community levels.
This page provides an overview of the KID. For more details, see KID Database Documentation and the Introduction to the KID, 2012 (PDF file, 424 KB; HTML).
The KID yields national estimates of hospital inpatient stays for patients younger than 21 years of age. The unique design of the KID enables national and regional studies of common and rare pediatric conditions.
The KID can be used to identify, track, and analyze national trends in health care utilization, access, charges, quality, and outcomes.
KID data are available every three years from 1997 through 2012, which allows researchers to analyze trends over time. The number of States in the KID has grown from 22 in the first year (1997) to 44 in 2012.
Key features of the most recent KID database year (2012) include:
Information on the previous releases of the KID may be found in the Introduction to the KID (PDF file, 424 KB; HTML).
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The KID contains 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). It contains more than 100 clinical and nonclinical data elements for each hospital stay, including:
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As a uniform, multi-State database, the KID promotes comparative studies of health care services and supports health care policy research on a variety of topics, including:
Spanning 15 years of data, the KID can be used for longitudinal analyses; however the database underwent changes in 2000. In order to facilitate analyis of trends including the 1997 KID, an alternate set of KID discharge weights for the 1997 HCUP KID were developed. These trend weights were calculated in the same way as the weights for the 2000 and later years of the KID. (Trend analyses for 2000 and later data do not need the KID trends weights.) The report, Using the Kids' Inpatient Database (KID) to Estimate Trends, includes details regarding the KID trends weights and other recommendations for trends analysis. The KID trends report is available on the HCUP-US Web site at http://www.hcup-us.ahrg.gov/reports/methods/2007_02.pdf, and the KID trends weights are available on the HCUP-US Web site at https://www.hcup-us.ahrq.gov/db/nation/kid/kidtrends.jsp
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The KID is released every 3 years, beginning with the 1997 data year; the most recent release is the 2012 KID. The databases are available for purchase through the HCUP Central Distributor.
Prior to purchasing HCUP data, all individuals are required to take the online HCUP Data Use Agreement Training Course, and users of the KID must read and sign the Data Use Agreement for Nationwide Databases (PDF file, 55 KB; HTML).
Instructions for purchasing the KID are available in the Kids' Inpatient Database (KID) Application Kit (PDF file, 130 KB).
Questions regarding purchasing databases can be directed to the HCUP Central Distributor:
Email: HCUPDistributor@AHRQ.govReturn to Contents
Telephone: (866) 556-4287 (toll free)
Fax: (866) 792-5313 (toll free)
The KID is distributed as fixed-width ASCII formatted data files compressed with SecureZIP® from PKWARE®. Beginning with the 2012 KID, the files are encrypted. To load and analyze the KID data on a computer, you will need the following:
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