Version Domain Sequence Variable Label Type Controlled Terminology or Format Role CDISC Notes Core
SDTMIG 3.3 RE 1 STUDYID Study Identifier Char Identifier Unique identifier for a study. Req
SDTMIG 3.3 RE 2 DOMAIN Domain Abbreviation Char RE Identifier Two-character abbreviation for the domain. Req
SDTMIG 3.3 RE 3 USUBJID Unique Subject Identifier Char Identifier Identifier used to uniquely identify a subject across all studies for all applications or submissions involving the product. Req
SDTMIG 3.3 RE 4 SPDEVID Sponsor Device Identifier Char Identifier Sponsor-defined identifier for a device. Perm
SDTMIG 3.3 RE 5 RESEQ Sequence Number Num Identifier Sequence number to ensure uniqueness of records within a dataset for a subject. May be any valid number (including decimals) and does not have to start at 1. Req
SDTMIG 3.3 RE 6 REGRPID Group ID Char Identifier Optional group identifier, used to link together a block of related records within a subject in a domain. Perm
SDTMIG 3.3 RE 7 REREFID Reference ID Char Identifier Optional internal or external procedure identifier. Perm
SDTMIG 3.3 RE 8 RESPID Sponsor-Defined Identifier Char Identifier Sponsor-defined identifier. Perhaps preprinted on the CRF as an explicit line identifier or defined in the sponsor's operational database. Perm
SDTMIG 3.3 RE 9 RELNKID Link ID Char Identifier Identifier used to link related records across domains. This may be a one-to-one or a one-to-many relationship. Perm
SDTMIG 3.3 RE 10 RELNKGRP Link Group Char Identifier Identifier used to link related records across domains. This will usually be a many-to-one relationship. Perm
SDTMIG 3.3 RE 11 RETESTCD Short Name of Respiratory Test Char (RETESTCD) Topic Short name of the measurement, test, or examination. It can be used as a column name when converting a dataset from a vertical format to a horizontal format. The value in RETESTCD cannot be longer than 8 characters, nor can it start with a number (e.g., "1TEST" is not valid). RETESTCD cannot contain characters other than letters, numbers, or underscores. Examples: "FEV1", "FVC". Req
SDTMIG 3.3 RE 12 RETEST Name of Respiratory Test Char (RETEST) Synonym Qualifier Verbatim name of the test or examination used to obtain the measurement or finding. The value in RETEST cannot be longer than 40 characters. Examples: "Forced Expiratory Volume in 1 Second", "Forced Vital Capacity". Req
SDTMIG 3.3 RE 13 RECAT Category for Respiratory Test Char Grouping Qualifier Used to categorize observations across subjects. Perm
SDTMIG 3.3 RE 14 RESCAT Subcategory for Respiratory Test Char Grouping Qualifier A further categorization. Perm
SDTMIG 3.3 RE 15 REPOS Position of Subject During Observation Char (POSITION) Record Qualifier Position of the subject during a measurement or examination. Examples: "SUPINE", "STANDING", "SITTING". Perm
SDTMIG 3.3 RE 16 REORRES Result or Finding in Original Units Char Result Qualifier Result of the procedure measurement or finding as originally received or collected. Exp
SDTMIG 3.3 RE 17 REORRESU Original Units Char (UNIT) Variable Qualifier Original units in which the data were collected. The unit for REORRES and REORREF. Perm
SDTMIG 3.3 RE 18 REORREF Reference Result in Original Units Char Variable Qualifier Reference result for continuous measurements in original units. Should be collected only for continuous results. Perm
SDTMIG 3.3 RE 19 RESTRESC Character Result/Finding in Std Format Char Result Qualifier Contains the result value for all findings, copied or derived from REORRES in a standard format or in standard units. RESTRESC should store all results or findings in character format; if results are numeric, they should also be stored in numeric format in RESTRESN. Exp
SDTMIG 3.3 RE 20 RESTRESN Numeric Result/Finding in Standard Units Num Result Qualifier Used for continuous or numeric results or findings in standard format; copied in numeric format from RESTRESC. RESTRESN should store all numeric test results or findings. Perm
SDTMIG 3.3 RE 21 RESTRESU Standard Units Char (UNIT) Variable Qualifier Standardized unit used for RESTRESC, RESTRESN and RESTREFN. Perm
SDTMIG 3.3 RE 22 RESTREFC Character Reference Result Char Variable Qualifier Reference value for the result or finding copied or derived from --ORREF in a standard format. Perm
SDTMIG 3.3 RE 23 RESTREFN Numeric Reference Result in Std Units Num Variable Qualifier Reference result for continuous measurements in standard units. Should be populated only for continuous results. Perm
SDTMIG 3.3 RE 24 RESTAT Completion Status Char (ND) Record Qualifier Used to indicate that a test was not done or a measurement was not taken. Should be null if a result exists in REORRES. Perm
SDTMIG 3.3 RE 25 REREASND Reason Not Done Char Record Qualifier Describes why a measurement or test was not performed. Examples: "BROKEN EQUIPMENT", "SUBJECT REFUSED". Used in conjunction with RESTAT when value is "NOT DONE". Perm
SDTMIG 3.3 RE 26 RELOC Location Used for the Measurement Char (LOC) Record Qualifier Anatomical location of the subject relevant to the collection of the measurement. Examples: "LUNG", "BRONCHUS". Perm
SDTMIG 3.3 RE 27 RELAT Laterality Char (LAT) Variable Qualifier Side of the body used to collect measurement. Examples: "RIGHT", "LEFT". Perm
SDTMIG 3.3 RE 28 REDIR Directionality Char (DIR) Variable Qualifier Qualifier for anatomical location or specimen further detailing directionality. Examples: "ANTERIOR", "LOWER", "PROXIMAL". Perm
SDTMIG 3.3 RE 29 REMETHOD Method of Test or Examination Char (METHOD) Record Qualifier Method used to create the result. Perm
SDTMIG 3.3 RE 30 RELOBXFL Last Observation Before Exposure Flag Char (NY) Record Qualifier Operationally-derived indicator used to identify the last non-missing value prior to RFXSTDTC. The value should be "Y" or null. Exp
SDTMIG 3.3 RE 31 REBLFL Baseline Flag Char (NY) Record Qualifier Indicator used to identify a baseline value. Should be Y or null. Note that REBLFL is retained for backward compatibility. The authoritative baseline flag for statistical analysis is in an ADaM dataset. Perm
SDTMIG 3.3 RE 32 REDRVFL Derived Flag Char (NY) Record Qualifier Used to indicate a derived record. Should be "Y" or null. Records that represent the average of other records, or that do not come from the CRF, or are not as originally collected or received are examples of records that would be derived for the submission datasets. If REDRVFL = "Y", then REORRES could be null, with RESTRESC and (if numeric) RESTRESN having the derived value. Perm
SDTMIG 3.3 RE 33 REEVAL Evaluator Char (EVAL) Record Qualifier Role of the person who provided the evaluation. Used only for results that are subjective (e.g., assigned by a person or a group). Examples: "ADJUDICATION COMMITTEE", "INDEPENDENT ASSESSOR", "RADIOLOGIST". Perm
SDTMIG 3.3 RE 34 REEVALID Evaluator Identifier Char (MEDEVAL) Variable Qualifier Used to distinguish multiple evaluators with the same role recorded in REEVAL. Examples: "RADIOLOGIST1" or "RADIOLOGIST2". Perm
SDTMIG 3.3 RE 35 REREPNUM Repetition Number Num Record Qualifier The instance number of a test that is repeated within a given time frame for the same test. The level of granularity can vary, e.g., within a time point or within a visit. For example, multiple measurements of pulmonary function. Perm
SDTMIG 3.3 RE 36 VISITNUM Visit Number Num Timing Clinical encounter number. Numeric version of VISIT, used for sorting. Exp
SDTMIG 3.3 RE 37 VISIT Visit Name Char Timing Protocol-defined description of a clinical encounter. May be used in addition to VISITNUM and/or VISITDY. Perm
SDTMIG 3.3 RE 38 VISITDY Planned Study Day of Visit Num Timing Planned study day of the visit based upon RFSTDTC in Demographics. Perm
SDTMIG 3.3 RE 39 TAETORD Planned Order of Element within Arm Num Timing Number that gives the planned order of the Element within the Arm for the Element in which the assessment was made. Perm
SDTMIG 3.3 RE 40 EPOCH Epoch Char (EPOCH) Timing Epoch associated with the date/time at which the assessment was made. Perm
SDTMIG 3.3 RE 41 REDTC Date/Time of Collection Char ISO 8601 Timing Date/time of procedure or test. Exp
SDTMIG 3.3 RE 42 REDY Study Day of Visit/Collection/Exam Num Timing Actual study day of visit/collection/exam expressed in integer days relative to the sponsor-defined RFSTDTC in Demographics. Perm
SDTMIG 3.3 RE 43 RETPT Planned Time Point Name Char Timing Text description of time when a measurement or observation should be taken as defined in the protocol. This may be represented as an elapsed time relative to a fixed reference point, such as time of last dose. See RETPTNUM and RETPTREF. Examples: "Start", "5 minutes post". Perm
SDTMIG 3.3 RE 44 RETPTNUM Planned Time Point Number Num Timing Numeric version of RETPT to aid in sorting. Perm
SDTMIG 3.3 RE 45 REELTM Planned Elapsed Time from Time Point Ref Char ISO 8601 Timing Planned Elapsed time relative to a planned fixed reference (RETPTREF). Not a clock time or a date/time variable, but an interval, represented as ISO duration. Examples: "-PT15M" to represent 15 minutes prior to the reference time point indicated by RETPTREF, or "PT8H" to represent 8 hours after the reference time point represented by RETPTREF. Perm
SDTMIG 3.3 RE 46 RETPTREF Time Point Reference Char Timing Description of the fixed reference point referred to by REELTM, RETPTNUM, and RETPT. Examples: "PREVIOUS DOSE", "PREVIOUS MEAL". Perm
SDTMIG 3.3 RE 47 RERFTDTC Date/Time of Reference Time Point Char ISO 8601 Timing Date/time for a fixed reference time point defined by RETPTREF. Perm