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Substance Use Occurrence
An indication or description regarding an episode of substance usage. (NCI Thesaurus)
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An indication or description that an individual's substance usage status is never, current, or former.
An indication or description of a change in substance usage.
A character or string that represents a substance usage group.
A characterization of the relationship of a substance use conclusion point in time to a reference point in time.
The day of the week substance usage concluded.
The date and time substance usage has concluded.
