This page is part of the FHIR Specification v4.1.0: R4B Ballot. About the R4B version of FHIR. The current version which supercedes this version is 5.0.0.  For a full list of available versions, see the Directory of published versions  . Page versions: R5 R4B R4 R3
. Page versions: R5 R4B R4 R3
| Biomedical Research and Regulation  Work Group | Maturity Level: 0 | Trial Use | Security Category: Patient | Compartments: Patient | 
Detailed Descriptions for the elements in the ResearchSubject resource.
| ResearchSubject | |
| Element Id | ResearchSubject | 
| Definition | A physical entity which is the primary unit of operational and/or administrative interest in a study. | 
| Cardinality | 0..* | 
| Type | DomainResource | 
| Alternate Names | Study Subject | 
| Summary | false | 
| Comments | Need to make sure we encompass public health studies. | 
| ResearchSubject.identifier | |
| Element Id | ResearchSubject.identifier | 
| Definition | Identifiers assigned to this research subject for a study. | 
| Note | This is a business identifier, not a resource identifier (see discussion) | 
| Cardinality | 0..* | 
| Type | Identifier | 
| Summary | true | 
| ResearchSubject.status | |
| Element Id | ResearchSubject.status | 
| Definition | The current state of the subject. | 
| Cardinality | 1..1 | 
| Terminology Binding | ResearchSubjectStatus (Required) | 
| Type | code | 
| Is Modifier | true (Reason: This element is labeled as a modifier because it is a status element that contains status entered-in-error which means that the resource should not be treated as valid) | 
| Summary | true | 
| To Do | Should this be a common code system for all events? | 
| ResearchSubject.period | |
| Element Id | ResearchSubject.period | 
| Definition | The dates the subject began and ended their participation in the study. | 
| Cardinality | 0..1 | 
| Type | Period | 
| Alternate Names | timing | 
| Summary | true | 
| To Do | .effectiveTime. | 
| ResearchSubject.study | |
| Element Id | ResearchSubject.study | 
| Definition | Reference to the study the subject is participating in. | 
| Cardinality | 1..1 | 
| Type | Reference(ResearchStudy) | 
| Summary | true | 
| ResearchSubject.individual | |
| Element Id | ResearchSubject.individual | 
| Definition | The record of the person or animal who is involved in the study. | 
| Cardinality | 1..1 | 
| Type | Reference(Patient) | 
| Summary | true | 
| ResearchSubject.assignedArm | |
| Element Id | ResearchSubject.assignedArm | 
| Definition | The name of the arm in the study the subject is expected to follow as part of this study. | 
| Cardinality | 0..1 | 
| Type | string | 
| Summary | false | 
| ResearchSubject.actualArm | |
| Element Id | ResearchSubject.actualArm | 
| Definition | The name of the arm in the study the subject actually followed as part of this study. | 
| Cardinality | 0..1 | 
| Type | string | 
| Summary | false | 
| ResearchSubject.consent | |
| Element Id | ResearchSubject.consent | 
| Definition | A record of the patient's informed agreement to participate in the study. | 
| Cardinality | 0..1 | 
| Type | Reference(Consent) | 
| Summary | false |