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NIS Description of Data Elements
The NIS is set of longitudinal hospital inpatient databases included in the HCUP family. These databases are created by AHRQ through a Federal-State-Industry partnership.
 
KEY_NIS - NIS record number
 
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes
 

KEY_NIS contains a unique record number and not a person identifier.

KEY_NIS can be used to link NIS records from different files, such as linking records from the NIS Core and Severity files.KEY_NIS cannot be used to link to other HCUP databases (e.g. the SID).

KEY_NIS cannot be used to link to other HCUP databases (e.g. the SID).

Beginning with the 2012 NIS, the data element KEY is replaced by the NIS record number (KEY_NIS).

 
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Uniform Values
VariableDescriptionValueValue Description
KEY_NISNIS record number8.nNIS record number
 
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State Specific Notes
None
 
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Internet Citation: HCUP NIS Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). September 2008. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/vars/key_nis/nisnote.jsp.
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Last modified 9/17/08