This code system http://terminology.hl7.org/CodeSystem/research-subject-state defines the following codes:
\n \n \n \n \n \n Code\n \n | \n \n \n \n Display\n \n | \n \n \n \n Definition\n \n | \n \n
\n \n \n \n candidate\n \n \n \n | \n \n Candidate | \n \n An identified person that can be considered for inclusion in a study. | \n \n
\n \n \n \n eligible\n \n \n \n | \n \n Eligible | \n \n A person that has met the eligibility criteria for inclusion in a study. | \n \n
\n \n \n \n follow-up\n \n \n \n | \n \n Follow-up | \n \n A person is no longer receiving study intervention and/or being evaluated with tests and procedures according to the protocol, but they are being monitored on a protocol-prescribed schedule. | \n \n
\n \n \n \n ineligible\n \n \n \n | \n \n Ineligible | \n \n A person who did not meet one or more criteria required for participation in a study is considered to have failed screening or\nis ineligible for the study. | \n \n
\n \n \n \n not-registered\n \n \n \n | \n \n Not Registered | \n \n A person for whom registration was not completed. | \n \n
\n \n \n \n off-study\n \n \n \n | \n \n Off-study | \n \n A person that has ended their participation on a study either because their treatment/observation is complete or through not\nresponding, withdrawal, non-compliance and/or adverse event. | \n \n
\n \n \n \n on-study\n \n \n \n | \n \n On-study | \n \n A person that is enrolled or registered on a study. | \n \n
\n \n \n \n on-study-intervention\n \n \n \n | \n \n On-study-intervention | \n \n The person is receiving the treatment or participating in an activity (e.g. yoga, diet, etc.) that the study is evaluating. | \n \n
\n \n \n \n on-study-observation\n \n \n \n | \n \n On-study-observation | \n \n The subject is being evaluated via tests and assessments according to the study calendar, but is not receiving any intervention. Note that this state is study-dependent and might not exist in all studies. A synonym for this is "short-term follow-up". | \n \n
\n \n \n \n pending-on-study\n \n \n \n | \n \n Pending on-study | \n \n A person is pre-registered for a study. | \n \n
\n \n \n \n potential-candidate\n \n \n \n | \n \n Potential Candidate | \n \n A person that is potentially eligible for participation in the study. | \n \n
\n \n \n \n screening\n \n \n \n | \n \n Screening | \n \n A person who is being evaluated for eligibility for a study. | \n \n
\n \n \n \n withdrawn\n \n \n \n | \n \n Withdrawn | \n \n The person has withdrawn their participation in the study before registration. | \n \n
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