description: The grade associated with the severity of an adverse event, using CTCAE criteria. The code '0' representing no adverse event may be used to provide positive confirmation that the clinician assessed or considered this particular AE, although the absence of an adverse event is generally not reportable. See https://ctep.cancer.gov/protocolDevelopment/electronic_applications/ctc.htm
package_name: hl7.fhir.us.codex-radiation-therapy
derivation: constraint
name: AdverseEventSeverityOrGrade
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-adverse-event-severity-or-grade'}
    index: 1
  value:
    choices: [valueCodeableConcept]
    index: 3
  valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 4}
package_version: 2.0.0-ballot
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-adverse-event-severity-or-grade
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 2.0.0-ballot