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Grouping variables are a subset of Identifier and Grouping Qualifier variablesused to group records in datasets by study, domain, across subjects, by subject, and for a subject. When used as intended, grouping variables and their values align with the hierarchy shown below. 


Metadataspec

Hierarchy of Grouping Variables

STUDYID


DOMAIN

--CAT

--SCAT

USUBJID

--GRPID


How to use Grouping Variables to Group DataUse Grouping Variables

Metadataspec
VariableGroupingUseNotesDescription
STUDYID

DOMAINAll recors
--CAT

--SCAT

USUBJID

--GRPID

...