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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.
 
DQTR - Discharge quarter
 
Documentation Sections:
General Notes
Uniform Values
General Notes
 

Discharge quarter (DQTR) is derived from either the month of the discharge date or the supplied discharge quarter. If both of those fields are invalid or missing, DQTR is set to zero. For these cases, a temporary discharge quarter = 3 was used for the DRG grouper and ICD-9-CM verification routines because these algorithms require a valid discharge quarter.

For HCUP inpatient data only, a temporary discharge quarter = 3 was used for the DRG grouper and ICD-9-CM verification routines when the discharge quarter was missing or invalid because these algorithms require a valid discharge quarter.

 
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Uniform Values
VariableDescriptionValueValue Description
DQTRDischarge quarter1First quarter (Jan - Mar)
2Second quarter (Apr - Jun)
3Third quarter (Jul - Sep)
4Fourth quarter (Oct - Dec)
0Missing or invalid
 
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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/dqtr/nassnote.jsp.
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Last modified 8/14/19