NCPI FHIR Implementation Guide v2 - Local Development build (v0.2.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions
Extension: Research Study Design
| Official URL: https://nih-ncpi.github.io/ncpi-fhir-ig-2/StructureDefinition/research-study-design | Version: 0.2.0 | |||
| Draft as of 2025-12-03 | Computable Name: ResearchStudyDesign | |||
Codes categorizing the type of study such as investigational vs. observational, type of blinding, type of randomization, safety vs. efficacy, etc.
Context of Use
-
Element ID:
ResearchStudy
This extension may be used on the following element(s)
Usage info
Usages:
- Use this Extension: NCPI Research Study
You can also check for usages in the FHIR IG Statistics
Formal Views of Extension Content
Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.
This structure is derived from Extension
| Name | Flags | Card. | Type | Description & Constraints Filter:   |
|---|---|---|---|---|
  Extension |
0..* | Extension | Research Study Design | |
  extension |
0..0 | Extension | ||
| url |
1..1 | uri | "https://nih-ncpi.github.io/ncpi-fhir-ig-2/StructureDefinition/research-study-design" | |
  value[x] |
0..1 | CodeableConcept | Value of extension Binding: https://hl7.org/fhir/valueset-study-design.html (example) | |
| Documentation for this format | ||||
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | Research Study Design | |
 id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..0 | Extension Slice: Unordered, Open by value:url | ||
| url |
1..1 | uri | "https://nih-ncpi.github.io/ncpi-fhir-ig-2/StructureDefinition/research-study-design" | |
| value[x] |
0..1 | CodeableConcept | Value of extension Binding: https://hl7.org/fhir/valueset-study-design.html (example) | |
| Documentation for this format | ||||
This structure is derived from Extension
Differential View
This structure is derived from Extension
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | Research Study Design | |
| extension |
0..0 | Extension | ||
| url |
1..1 | uri | "https://nih-ncpi.github.io/ncpi-fhir-ig-2/StructureDefinition/research-study-design" | |
| value[x] |
0..1 | CodeableConcept | Value of extension Binding: https://hl7.org/fhir/valueset-study-design.html (example) | |
| Documentation for this format | ||||
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | Research Study Design | |
| id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..0 | Extension Slice: Unordered, Open by value:url | ||
| url |
1..1 | uri | "https://nih-ncpi.github.io/ncpi-fhir-ig-2/StructureDefinition/research-study-design" | |
| value[x] |
0..1 | CodeableConcept | Value of extension Binding: https://hl7.org/fhir/valueset-study-design.html (example) | |
| Documentation for this format | ||||
This structure is derived from Extension
Other representations of profile: CSV, Excel, Schematron
Terminology Bindings
| Path | Status | Usage | ValueSet | Version | Source |
| Extension.value[x] | Base | example | https://hl7.org/fhir/valueset-study-design.html | Not State | Unknown |
Constraints
| Id | Grade | Path(s) | Description | Expression |
| ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children |
hasValue() or (children().count() > id.count())
|
| ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both |
extension.exists() != value.exists()
|