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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.
ADAYWK - Admission day of week
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

Admission day of the week (ADAYWK) is calculated from the admission date (ADATE). If ADAYWK cannot be calculated (ADATE is missing or invalid), then:

  • ADAYWK is set to the supplied admission day of the week, if available.
  • ADAYWK is missing (.) if the supplied admission day of week is missing.
  • If ADAYWK is out of range (ADAYWK NE 1-7) or nonnumeric, it is set to invalid (.A).
  • In the 1988-1997 HCUP files, if the data source does not provide the admission date or admission day of week, then ADAYWK is set to unavailable from source (.B).

Beginning in the 1998 HCUP files, the data element ADAYWK is replaced by admission weekend (AWEEKEND).

Uniform Values
VariableDescriptionValueValue Description
ADAYWKAdmission day of week1Sunday
.BUnavailable from source (coded 1988-1997 data only)
State Specific Notes

Internet Citation: HCUP KID Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). September 2008. Agency for Healthcare Research and Quality, Rockville, MD.
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Last modified 9/17/08