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Substance Use Dose
The amount of substance that a subject has used. (NCI Thesaurus)
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A subject domain utilized for the submission of information encompassing and representing data, vocabulary or records related to substance use.
The total amount of substance the subject uses on a daily basis.
A character or string that represents a substance use class.
The variable assigned to a substance usage class.
A classification scheme based on the use of a particular material or product.
A point in time that indicates the beginning of substance usage.
