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Recruitment status

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The state of participant recruitment for a study:

Not yet recruiting: The study has not started recruiting participants.

Recruiting: The study is currently recruiting participants.

Enrolling by invitation: The study is selecting its participants from a population, or group of people, decided on by the researchers in advance. These studies are not open to everyone who meets the eligibility criteria but only to people in that population, who are specifically invited to participate.

Active, not recruiting: The study is ongoing, and participants are receiving an intervention or being examined, but potential participants are not currently being recruited or enrolled.

Suspended: The study has stopped early but may start again.

Terminated: The study has stopped early and will not start again. Participants are no longer being examined or treated.

Completed: The study has ended normally, and participants are no longer being examined or treated (that is, the final participant’s last visit has occurred).

Withdrawn: The study stopped early, before enrolling its first participant.

NIH Glossary of Common Site Terms

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