Skip Navigation

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 - Sequence number
 
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes
 

Sequence number (SEQ) is a unique number assigned to each discharge. SEQ does not match the sequence number SEQ_SID. Beginning in the 1998 data, the data element KEY is used instead of SEQ on all HCUP databases.

Beginning in 1994:

The Nationwide Inpatient Sample is sorted by SEQ. SEQ is only included in the Nationwide Inpatient Sample, not the State Inpatient Databases.

SEQ_SID is included in both the Nationwide Inpatient Sample and the State Inpatient Databases. SEQ_SID is identical for discharges present in both the Nationwide Inpatient Sample and State Inpatient Databases. The State Inpatient Databases are sorted by SEQ_SID.

From 1988-1993:

Both the Nationwide Inpatient Sample and the State Inpatient Databases are sorted by SEQ. SEQ is identical for discharges present in both the HCUP Nationwide Inpatient Sample and State Inpatient Databases.

SEQ_SID is not included in either the HCUP Nationwide Inpatient Sample or the State Inpatient Databases.

 
Top
 
Uniform Values
VariableDescriptionValueValue Description
SEQSequence number13(n)HCUP Record sequence number
 
Top
 
 
State Specific Notes
None
 
Top
 
 

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/nisnote.jsp.
Are you having problems viewing or printing pages on this Website?
If you have comments, suggestions, and/or questions, please contact hcup@ahrq.gov.
Privacy Notice, Viewers & Players
Last modified 9/17/08