?:definition
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A coded value specifying how subject or experimental unit exposures to treatment strategies (which may include controls such as no treatment) will be identified, for retrospective studies, or planned, for prospective studies, in order to characterize treatment effects and compare effects of different treatment strategies in the execution of a clinical or pre-clinical study. The configuration will specify whether a subject or experimental unit received or is to receive only one exposure or multiple exposures, and, if multiple exposures, whether those exposures were/are to be simultaneous or in series. EXAMPLE(S): Parallel Group Design, Crossover Design, Factorial Designs, Cohort, Case-control, Case-only, Case-crossover, Ecologic or Community Studies, Family-based OTHER NAME(S): NOTE(S): The configuration usually requires randomization to one or more treatment arms, each arm being allocated a different (or no) treatment.
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