Table 3.3.1.1 Identifier Variables for BDS Datasets
Variable Name
Variable Label
Type
Codelist/ Controlled Terms
Core
CDISC Notes
STUDYID
Study Identifier
Char
Req
DM.STUDYID, ADSL STUDYID, and/or STUDYID from another ADaM or SDTM dataset appropriate to the analysis.
USUBJID
Unique Subject Identifier
Char
Req
DM.USUBJID, ADSL.USUBJID, and/or USUBJID from another ADaM or SDTM dataset appropriate to the analysis.
SUBJID
Subject Identifier for the Study
Char
Perm
DM.SUBJID, ADSL.SUBJID, and/or SUBJID from another ADaM dataset appropriate to the analysis. SUBJID is required in ADSL, but permissible in other datasets.
SITEID
Study Site Identifier
Char
Perm
DM.SITEID, ADSL.SITEID, and/or SITEID from another ADaM dataset appropriate to the analysis. SITEID is required in ADSL, but permissible in other datasets.
ASEQ
Analysis Sequence Number
Num
Perm
Sequence number given to ensure uniqueness of subject records within an ADaM dataset. As long as values are unique within a subject within the dataset, any valid number can be used for ASEQ. ASEQ uniquely indexes records within a subject within an ADaM dataset.
ASEQ is useful for traceability when the dataset is used as input to another ADaM dataset. To refer to a record in a predecessor ADaM dataset, set SRCDOM to the name of the predecessor dataset, and set SRCSEQ to the value of ASEQ in the predecessor dataset.