DEFINITION :  The Substance Use (SU) domain records information about a subject’s use of tobacco, alcohol, drugs, or other substances during the study. It provides insights into lifestyle factors that may affect study outcomes.

PURPOSE : To document the subject’s use of substances that could influence the clinical trial results or interact with the treatment being studied.

STRUCTURE : One record per substance type per reported occurrence per subject

TOPIC : SUTRT

KEY VARIABLES : STUDYID, USUBJID, SUTRT, SUSTDTC