**Definition:**Specifies the reason that an event occurred in a clinical research study.
\nhttp://terminology.hl7.org/CodeSystem/v3-ActReason
Code | Display | |
RET | retest | **Definition:**The event occurred so that a test or observation performed at a prior event could be performed again due to conditions set forth in the protocol. |
SCH | scheduled | **Definition:**The event occurred due to it being scheduled in the research protocol. |
TRM | termination | **Definition:**The event occurred in order to terminate the subject's participation in the study. |
UNS | unscheduled | **Definition:**The event that occurred was initiated by a study participant (e.g. the subject or the investigator), and did not occur for protocol reasons. |