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All CDASH CT codelists are a subset of an SDTM CT codelist. CDASHIG v2.1 metadata table contain these relevant columns & their description:

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In general, SDTM variable's controlled terms can be categorized into these categories:

CDISC Controlled Terminology
External dictionaries, e.g., MedDRA, WHODrug Global, LOINC, DUNS, etc.
Dataset and variable identifiers for referential purpose, e.g., IDVAR, IDVARVAL, RDOMAIN
Partially controlled:
1. "UNPLAN" for SE.ETCD, otherwise not controlled
2. "Screen Failure" for DM.ACTARM, otherwise subject to study design

Aside from the use of CDISC CT and external dictionaries, some ADaM variables have a value list. Here is a representative list:

	Variable	Value List	Remarks
1	SMQzzSC	BROAD, NARROW
2	SMQzzSCN	1, 2	This is a numerical representation of BROAD and NARROW in SMQzzSC. One can deduce the value meaning by pairing these two representations. However, to a machine, it will need a method to store the definition.
3	CRITyFL	Y or Y, N
4	CRITyFN	1 or 1, 0

This is sometimes referred to response codelist, although the utilization goes beyond just test & responses. Use cases are:

QRS Supplements to SDTMIG: Illustrate detailed relationship among --CAT, --TEST, --ORRES, and -STRSC. Additional properties in other SDTMIG variables may occasionally be at play, e.g., --EVLINT
1. Response codelist is applicable. Coded ordinals are a good example, where responses may have a numerical value (code) & a label (decode).

Certain CDISC variables have prescribed value domains that hinges on data types or sub-types. Here is a list of representative sample:

	Variable	Described Value Domain	ODM Data Type(s)	Sub-Type	Remarks
1	--DTC	ISO 8601 datetime	datetime, date, time, partialDate, partialTime, partialDatetime, incompleteDatetime, intervalDatetime
2	--DTC	ISO 8601 duration	durationDatetime
3	--SEQ	Num	float
4	TDSTOFF	Num	integer	0 or any positive integer
5	RPRFDY	Num	integer	0; 1
6	ECDOSE	Num	float	Any positive number	With a rule that a value can't be 0