• Include these codes as defined in http://terminology.hl7.org/CodeSystem/research-subject-state version 0.1.0

  Code	Display	Definition
  candidate	Candidate	An identified person that can be considered for inclusion in a study.
  eligible	Eligible	A person that has met the eligibility criteria for inclusion in a study.
  follow-up	Follow-up	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.
  ineligible	Ineligible	A person who did not meet one or more criteria required for participation in a study is considered to have failed screening or is ineligible for the study.
  not-registered	Not Registered	A person for whom registration was not completed.
  off-study	Off-study	A person that has ended their participation on a study either because their treatment/observation is complete or through not responding, withdrawal, non-compliance and/or adverse event.
  on-study	On-study	A person that is enrolled or registered on a study.
  on-study-intervention	On-study-intervention	The person is receiving the treatment or participating in an activity (e.g. yoga, diet, etc.) that the study is evaluating.
  on-study-observation	On-study-observation	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".
  pending-on-study	Pending on-study	A person is pre-registered for a study.
  potential-candidate	Potential Candidate	A person that is potentially eligible for participation in the study.
  screening	Screening	A person who is being evaluated for eligibility for a study.
  withdrawn	Withdrawn	The person has withdrawn their participation in the study before registration.

This value set expansion contains 13 concepts.