Version Domain Sequence Variable Label Type Controlled Terminology or Format Role CDISC Notes Core
SDTMIG 3.3 TV 1 STUDYID Study Identifier Char Identifier Unique identifier for a study. Req
SDTMIG 3.3 TV 2 DOMAIN Domain Abbreviation Char TV Identifier Two-character abbreviation for the domain. Req
SDTMIG 3.3 TV 3 VISITNUM Visit Number Num Topic 1. Clinical encounter number 2. Numeric version of VISIT, used for sorting. Req
SDTMIG 3.3 TV 4 VISIT Visit Name Char Synonym Qualifier 1. Protocol-defined description of clinical encounter. 2. May be used in addition to VISITNUM and/or VISITDY as a text description of the clinical encounter. Perm
SDTMIG 3.3 TV 5 VISITDY Planned Study Day of Visit Num Timing 1. Planned study day of VISIT. 2. Due to its sequential nature, used for sorting. Perm
SDTMIG 3.3 TV 6 ARMCD Planned Arm Code Char Record Qualifier 1. ARMCD is limited to 20 characters and does not have special character restrictions. The maximum length of ARMCD is longer than for other "short" variables to accommodate the kind of values that are likely to be needed for crossover trials. For example, if ARMCD values for a seven-period crossover were constructed using two-character abbreviations for each treatment and separating hyphens, the length of ARMCD values would be 20. 2. If the timing of Visits for a trial does not depend on which Arm a subject is in, then ARMCD should be null. Exp
SDTMIG 3.3 TV 7 ARM Description of Planned Arm Char Synonym Qualifier 1. Name given to an Arm or Treatment Group. 2. If the timing of Visits for a trial does not depend on which Arm a subject is in, then Arm should be left blank. Perm
SDTMIG 3.3 TV 8 TVSTRL Visit Start Rule Char Rule Rule describing when the Visit starts, in relation to the sequence of Elements. Req
SDTMIG 3.3 TV 9 TVENRL Visit End Rule Char Rule Rule describing when the Visit ends, in relation to the sequence of Elements. Perm