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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.
 
AGEMONTH - Age in months (when AGE is less than 11 years)
 
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes
 

Age in months (AGEMONTH) is reported for patients less than 11 years of age. AGEMONTH is calculated from date of birth (DOB) and the admission date (ADATE) with the following exceptions:

  • AGEMONTH is set to the supplied age in months if the age cannot be calculated (ADATE and/or DOB is missing or invalid).
  • AGEMONTH is missing (.) if the age cannot be calculated and the reported age in months is missing.
  • AGEMONTH is missing (.) if the calculated age in years is out of range (AGE NE 0-124).
  • AGEMONTH is invalid (.A) if the age in months cannot be calculated and the supplied age in months is nonnumeric. An invalid calculated AGEMONTH is not replaced by the reported age in months.
  • AGEMONTH is set to inconsistent (.C) if AGEMONTH is inconsistent with neonatal diagnoses (EAGE04), or is inconsistent with maternal diagnoses/procedures (EAGE05).
 
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Uniform Values
VariableDescriptionValueValue Description
AGEMONTHAge in months (when AGE is less than 11 years)0-131Months
.Missing
.AInvalid
.CInconsistent: beginning with 1998 data, EAGE04, EAGE05
 
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State Specific Notes

Alaska

Only the calculated age in months could be used to assign AGEMONTH because Alaska did not supply this information.



Georgia

Prior to 2001, the reported age in months is available only through 2 years of age. AGEMONTH is missing (.) for patients over 2 years old.

Beginning with the 2001 data, Georgia reported age in months through 11 years of age (0-132 months).



Indiana

Only the calculated age in months could be used to assign AGEMONTH because Indiana did not supply this information.



Michigan

Prior to 2001, AGEMONTH could not be calculated because Michigan did not report admission and birth dates. Beginning with the 2001 data, Michigan provided complete dates and AGEMONTH could be calculated.



Minnesota

Only the calculated age in months could be used to assign AGEMONTH because Minnesota did not supply this information.



Missouri

Only the calculated age in months could be used to assign AGEMONTH because Missouri did not supply this information.



Nebraska

Only the calculated age in months could be used to assign AGEMONTH because Nebraska did not supply this information.



Nevada

Only the calculated age in months could be used to assign AGEMONTH because Nevada did not supply this information.



New Hampshire

Only the calculated age in months could be used to assign AGEMONTH because New Hampshire did not supply this information.



North Dakota

Only the calculated age in months could be used to assign AGEMONTH because North Dakota did not supply this information.



Ohio

Only the calculated age in months could be used to assign AGEMONTH because Ohio did not supply this information.



Oklahoma

Patient age in months (AGEMONTH) could not be calculated from dates because Oklahoma did not report date of birth. During HCUP processing, only the reported age in months could be used to assign AGEMONTH.



Rhode Island

Only the calculated age in months could be used to assign AGEMONTH because Rhode Island did not supply this information.



South Dakota

Only the calculated age in months could be used to assign AGEMONTH because South Dakota did not supply this information.



Vermont

Only the calculated age in months could be used to assign AGEMONTH because Vermont did not supply this information.



Washington

For 2010, Washington supplied age in months, but it was calculated using discharge date instead of admission date. LOS can be used to adjust the age accordingly.


 
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Internet Citation: HCUP KID 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/agemonth/kidnote.jsp.
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Last modified 9/17/08