| Code | Display | Definition | Deprecated |
| adverseEvent | adverse event | adverse event. | |
| death | death (adverse event) | death (adverse event). | |
| notEligible | did not meet eligibility criteria | did not meet eligibility criteria. | |
| eligibleButNo | eligible but unwilling or unable to participate | eligible but unwilling or unable to participate. | |
| enrolled | enrolled or registered | enrolled or registered. | |
| exclusion | exclusion | exclusion. | |
| followUpComplete | follow-up complete | follow-up complete. | |
| inclusion | inclusion | inclusion. | |
| informedConsentSigned | Informed consent signed | Informed consent signed. | Deprecated |
| intOrObsComplete | intervention or observation complete | intervention or observation complete. | Deprecated |
| nonCompliance | non-compliance | non-compliance. | |
| preReg | pre-registered or slot reserved | pre-registered or slot reserved. | |
| refuseConsent | refuse consent | refuse consent. | |
| screenFailure | screen failure | screen failure. | |
| studyClosed | study permanently closed to accrual | study permanently closed to accrual. | |
| studyTerminated | study terminated | study terminated. | |
| subjectRefusal | subject refusal | subject refusal. | |
| unwillingOrUnable | unwilling or unable to participate | unwilling or unable to participate. | |
| withdrawnConsent | withdrawn consent | withdrawn consent. | |
| unable-to-participate | Unable to Participate | The subject (ResearchSubject) is not able to take part in the ResearchStudy. Examples: subject has moved away; subject cannot drive and therefore unable to participate, etc. | |
| unwilling-to-participate | Unwilling to Participate | The subject (ResearchSubject) is refusing to take part in the ResearchStudy. Note: Subject refusal is a synonymous term and is used in some studies. | |
| screening-failure | Screening Failure | The failure of the potential subject (ResearchSubject) of meeting one or more criteria required for participation in a trial. | |
| intervention-complete | Intervention Complete | The subject (ResearchSubject) has finished the planned protocol-specified treatment phase. | |
| follow-up-complete | Follow-up Complete | The subject (ResearchSubject) has finished the planned protocol-specified follow-up phase. | |
| adverse-event | Adverse Event | The subject (ResearchSubject) has experienced any unfavorable or unintended disease, sign, or symptom that is temporally associated with the use of a medical treatment or procedure and that may or may not be considered related to the medical treatment or procedure. | |
| consent-withdrawn | Consent Withdrawn | The subject (ResearchSubject) has revoked permission to participate in the study or one or more components of the study. | |
| non-compliance | Non-compliance | The subject (ResearchSubject) has failed to follow medical advice, take medication as directed, or adhere to a prescribed course of treatment. | |