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NASS Description of Data Elements
The Nationwide Ambulatory Surgery Sample (NASS) is a set of ambulatory surgery databases included in the HCUP family. These databases are created by AHRQ through a Federal-State-Industry partnership.
 
AWEEKEND - Admission day is on a weekend
 
Documentation Sections:
General Notes
Uniform Values
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).

 
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Uniform Values
VariableDescriptionValueValue Description
AWEEKENDAdmission day is on a weekend0Admitted Monday-Friday
1Admitted Saturday-Sunday
.Missing
.AInvalid
 
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Internet Citation: HCUP NASS Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). August 2019. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/vars/aweekend/nassnote.jsp.
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Last modified 8/14/19