> ## Documentation Index
> Fetch the complete documentation index at: https://docs.metriport.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ResearchStudy

> A process where a researcher or organization plans and then executes a series of steps intended to increase the field of healthcare-related knowledge.  This includes studies of safety, efficacy, comparative effectiveness and other information about medications, devices, therapies and other interventional and investigative techniques.  A ResearchStudy involves the gathering of information about human or animal subjects.

## Properties

| Name | Required | Type | Description |
| - | - | - | - |
| identifier | No | [Identifier](/medical-api/fhir/data-types/identifier)\[] | Business Identifier for study |
| title | No | string | Name for this study |
| protocol | No | Reference\<[PlanDefinition](/medical-api/fhir/resources/plandefinition)>\[] | Steps followed in executing study |
| partOf | No | Reference\<[ResearchStudy](/medical-api/fhir/resources/researchstudy)>\[] | Part of larger study |
| status | Yes | code | active / administratively-completed / approved / closed-to-accrual / closed-to-accrual-and-intervention / completed / disapproved / in-review / temporarily-closed-to-accrual / temporarily-closed-to-accrual-and-intervention / withdrawn |
| primaryPurposeType | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | treatment / prevention / diagnostic / supportive-care / screening / health-services-research / basic-science / device-feasibility |
| phase | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | n-a / early-phase-1 / phase-1 / phase-1-phase-2 / phase-2 / phase-2-phase-3 / phase-3 / phase-4 |
| category | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Classifications for the study |
| focus | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Drugs, devices, etc. under study |
| condition | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Condition being studied |
| contact | No | [ContactDetail](/medical-api/fhir/data-types/contactdetail)\[] | Contact details for the study |
| relatedArtifact | No | [RelatedArtifact](/medical-api/fhir/data-types/relatedartifact)\[] | References and dependencies |
| keyword | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Used to search for the study |
| location | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Geographic region(s) for study |
| description | No | markdown | What this is study doing |
| enrollment | No | Reference\<[Group](/medical-api/fhir/resources/group)>\[] | Inclusion & exclusion criteria |
| period | No | [Period](/medical-api/fhir/data-types/period) | When the study began and ended |
| sponsor | No | Reference\<[Organization](/medical-api/fhir/resources/organization)> | Organization that initiates and is legally responsible for the study |
| principalInvestigator | No | Reference\<[Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole)> | Researcher who oversees multiple aspects of the study |
| site | No | Reference\<[Location](/medical-api/fhir/resources/location)>\[] | Facility where study activities are conducted |
| reasonStopped | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | accrual-goal-met / closed-due-to-toxicity / closed-due-to-lack-of-study-progress / temporarily-closed-per-study-design |
| note | No | [Annotation](/medical-api/fhir/data-types/annotation)\[] | Comments made about the study |
| arm | No | ResearchStudyArm | Defined path through the study for a subject |
| - id | No | string | Unique id for inter-element referencing |
| - extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations |
| - modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored even if unrecognized |
| - name | Yes | string | Label for study arm |
| - type | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Categorization of study arm |
| - description | No | string | Short explanation of study path |
| objective | No | ResearchStudyObjective | A goal for the study |
| - id | No | string | Unique id for inter-element referencing |
| - extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations |
| - modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored even if unrecognized |
| - name | No | string | Label for the objective |
| - type | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | primary / secondary / exploratory |

## Search Parameters

| Name | Type | Description | Expression |
| - | - | - | - |
| category | token | Classifications for the study | ResearchStudy.category |
| date | date | When the study began and ended | ResearchStudy.period |
| focus | token | Drugs, devices, etc. under study | ResearchStudy.focus |
| identifier | token | Business Identifier for study | ResearchStudy.identifier |
| keyword | token | Used to search for the study | ResearchStudy.keyword |
| location | token | Geographic region(s) for study | ResearchStudy.location |
| partof | reference | Part of larger study | ResearchStudy.partOf |
| principalinvestigator | reference | Researcher who oversees multiple aspects of the study | ResearchStudy.principalInvestigator |
| protocol | reference | Steps followed in executing study | ResearchStudy.protocol |
| site | reference | Facility where study activities are conducted | ResearchStudy.site |
| sponsor | reference | Organization that initiates and is legally responsible for the study | ResearchStudy.sponsor |
| status | token | active / administratively-completed / approved / closed-to-accrual / closed-to-accrual-and-intervention / completed / disapproved / in-review / temporarily-closed-to-accrual / temporarily-closed-to-accrual-and-intervention / withdrawn | ResearchStudy.status |
| title | string | Name for this study | ResearchStudy.title |

## Inherited Properties

| Name | Required | Type | Description |
| - | - | - | - |
| id | No | string | Logical id of this artifact |
| meta | No | [Meta](/medical-api/fhir/data-types/meta) | Metadata about the resource |
| implicitRules | No | uri | A set of rules under which this content was created |
| language | No | code | Language of the resource content |
| text | No | [Narrative](/medical-api/fhir/data-types/narrative) | Text summary of the resource, for human interpretation |
| contained | No | Resource\[] | Contained, inline Resources |
| extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations |
| modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored |

To view the FHIR specification for this resource, see [ResearchStudy](https://www.hl7.org/fhir/StructureDefinition/ResearchStudy).


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