DEFINITION :  The SR domain records relationships between multiple subjects in a study. These relationships may be biological, familial, or other types of relationships relevant to the study outcomes. For example, in studies involving twins or family members, this domain helps identify how one subject’s data might influence another’s, providing a clearer context for data analysis.

PURPOSE : To document and explain the relationships between different subjects within a clinical trial. The domain provides insights into how these relationships may influence the outcomes of the study, particularly in genetic, familial, or socially related studies.

STRUCTURE : One record per test per visit per subject

TOPIC : SRTESTCD

KEY VARIABLES :