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Grouping variables are Identifier and Grouping Qualifier variables used to group records in datasets. 

How to Use Grouping Variables to Group Data


Metadataspec

Hierarchy of Grouping Variables

STUDYID, DOMAIN


--CAT

--SCAT


USUBJID



--GRPID

Hierarchy of Grouping Variables

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Grouping variables 





How Grouping Variables Group Data

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