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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.
 
SEQ_SID - HCUP SID sequence number
 
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes
 

The unique HCUP record number assigned to each discharge varies by year.

  • In the 1988-1993 data, the data element SEQ is on all HCUP databases.
  • In the 1994-1997 data,
    • SEQ is only on the NIS.
    • SEQ_SID is on the HCUP inpatient databases (SID and NIS), and
    • SEQ_ASD is on the HCUP outpatient databases.
  • Beginning in the 1998 data, the data element KEY is used on all HCUP databases.
 
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Uniform Values
VariableDescriptionValueValue Description
SEQ_SIDHCUP SID sequence number13(n)Record sequence number in SID
 
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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/seq_sid/nisnote.jsp.
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Last modified 9/17/08