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KID Description of Data Elements
The KID is set of longitudinal hospital inpatient databases included in the HCUP family. These databases are created by AHRQ through a Federal-State-Industry partnership.
APRDRG_Risk_Mortality - All Patient Refined DRG: Risk of Mortality Subclass
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

The All Patient Refined DRGs (APR-DRGs) are assigned using software developed by 3M Health Information Systems. This severity measure includes the base APR-DRG, the severity of illness subclass, and the risk of mortality subclass within each base APR-DRG. The prefix "APRDRG" has been included in the data element names to distinguish APR-DRG measures from other HCUP data elements. For more information, please refer to the following documents available on the NIS Documentation CD-ROM and on the HCUP User Support Website (

  • Overview of Severity Systems
  • APR-DRGs V20 Methodology Booklet

Uniform Values
VariableDescriptionValueValue Description
APRDRG_Risk_MortalityAll Patient Refined DRG: Risk of Mortality Subclass0No class specified
1Minor likelihood of dying
2Moderate likelihood of dying
3Major likelihood of dying
4Extreme likelihood of dying
State Specific Notes

Internet Citation: HCUP KID Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). September 2008. Agency for Healthcare Research and Quality, Rockville, MD.
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Last modified 9/17/08