Version Domain Sequence Variable Label Type Controlled Terminology or Format Role CDISC Notes Core
SDTMIG 3.3 SM 1 STUDYID Study Identifier Char Identifier Unique identifier for a study. Req
SDTMIG 3.3 SM 2 DOMAIN Domain Char SM Identifier Two-character abbreviation for the domain. Req
SDTMIG 3.3 SM 3 USUBJID Unique Subject Identifier Char Identifier Identifier used to uniquely identify a subject across all studies. Req
SDTMIG 3.3 SM 4 SMSEQ Sequence Number Num Identifier Sequence number to ensure uniqueness of subject records. Should be assigned to be consistent chronological order. Req
SDTMIG 3.3 SM 5 MIDS Disease Milestone Instance Name Char Topic Name of the specific Disease Milestone. For types of Disease Milestone that can occur multiple times, the name will end with a sequence number. Example: "HYPO1". Req
SDTMIG 3.3 SM 6 MIDSTYPE Disease Milestone Type Char Record Qualifier The type of Disease Milestone. Example: "HYPOGLYCEMIC EVENT". Req
SDTMIG 3.3 SM 7 SMSTDTC Start Date/Time of Milestone Char ISO 8601 Timing State date/time of Milestone Instance, if Milestone is an intervention or event, or date of Milestone if Milestone is a finding. Exp
SDTMIG 3.3 SM 8 SMENDTC End Date/Time of Milestone Char ISO 8601 Timing End date/time of Disease Milestone Instance. Exp
SDTMIG 3.3 SM 9 SMSTDY Study Day of Start of Milestone Num Timing Study day of start of Disease Milestone Instance, relative to the sponsor-defined RFSTDTC. Exp
SDTMIG 3.3 SM 10 SMENDY Study Day of End of Milestone Num Timing Study day of end of Disease Milestone Instance, relative to the sponsor-defined RFSTDTC. Exp