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Central Distributor SEDD: Description of Data Elements

AWEEKEND - Admission day is on a weekend
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

An indicator of whether the admission day is on the weekend (AWEEKEND) is calculated from the admission date (ADATE). If AWEEKEND cannot be calculated (ADATE is missing or invalid), then

  • AWEEKEND is missing (.) if ADATE is missing (.) or
  • AWEEKEND is invalid (.A) if ADATE is invalid (.A).

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

Uniform Values
VariableDescriptionValueValue Description
AWEEKENDAdmission day is on a weekend0Admitted Monday-Friday
1Admitted Saturday-Sunday
State Specific Notes


During HCUP processing, AWEEKEND was assigned using the reported admission day of week if the day could not be calculated from admission date.

New York

Because New York masked the admission dates on AIDS/HIV* records, AWEEKEND is missing (.) on these discharges.

*New York identifies AIDS/HIV records by ICD-9-CM diagnosis code or DRG:

  • An admitting, principal, or secondary diagnosis of "042" "043" "044" "7958" "27910", "27919", "2793", "1363", "79571", "07951", "07952", "07953" or "V08", or "V08".
  • A DRG of 488 through 490 or 700 through 716.


Internet Citation: HCUP Central Distributor SEDD Description of Data Elements - All States. Healthcare Cost and Utilization Project (HCUP). May 2024. Agency for Healthcare Research and Quality, Rockville, MD.
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Last modified 5/22/24