> ## 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).