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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.
 
AGE_NEONATE - Neonatal age (first 28 days after birth) indicator
 
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes
 

Neonatal age indicator (AGE_NEONATE) indicates admissions during the first 28 days after birth. It is only reported for patients less than 1 year old (AGE=0). AGE_NEONATE is calculated from age in days (AGEDAY) and should be used in conjunction with AGE.

AGE_NEONATE is missing (.)

  • if AGE is one year or more
  • if AGEDAY is missing (.), invalid (.A), inconsistent (.C), or not present on the HCUP files

Beginning with 2012 data, the data element AGEDAY is replaced by the neonatal age indicator (AGE_NEONATE) on the NIS.

 
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Uniform Values
VariableDescriptionValueValue Description
AGE_NEONATENeonatal age (first 28 days after birth) indicator0Non-neonatal age at admission
1Neonatal age at admission
.Missing
 
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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/age_neonate/nisnote.jsp.
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Last modified 9/17/08