# EvidenceVariable ## Get FHIR r4 evidence variables - [GET /site/{siteId}/fhir/evidence-variable](https://docs.heydonto.com/apis/fhir/openapi/evidencevariable/fhirevidencevariablecontroller_getevidencevariables.md) ## Create FHIR r4 evidence variable - [POST /site/{siteId}/fhir/evidence-variable](https://docs.heydonto.com/apis/fhir/openapi/evidencevariable/fhirevidencevariablecontroller_createevidencevariable.md) ## Get FHIR r4 evidence variable by ID - [GET /site/{siteId}/fhir/evidence-variable/{id}](https://docs.heydonto.com/apis/fhir/openapi/evidencevariable/fhirevidencevariablecontroller_getevidencevariable.md) ## Update FHIR r4 evidence variable - [PUT /site/{siteId}/fhir/evidence-variable/{id}](https://docs.heydonto.com/apis/fhir/openapi/evidencevariable/fhirevidencevariablecontroller_updateevidencevariable.md) ## Delete FHIR r4 evidence variable - [DELETE /site/{siteId}/fhir/evidence-variable/{id}](https://docs.heydonto.com/apis/fhir/openapi/evidencevariable/fhirevidencevariablecontroller_deleteevidencevariable.md) ## Get FHIR r4 evidence variable history by ID - [GET /site/{siteId}/fhir/evidence-variable/{id}/history](https://docs.heydonto.com/apis/fhir/openapi/evidencevariable/fhirevidencevariablecontroller_getevidencevariablehistory.md)