{
  "resourceType": "Questionnaire",
  "status": "active",
  "item": [
    {
      "linkId": "qsofa",
      "text": "qSOFA Sepsis Screen",
      "type": "group",
      "item": [
        {
          "linkId": "qsofa-resp",
          "text": "Respiratory rate 22 breaths per minute or higher",
          "type": "boolean"
        },
        {
          "linkId": "qsofa-mentation",
          "text": "Altered mentation (Glasgow Coma Scale below 15)",
          "type": "boolean"
        },
        {
          "linkId": "qsofa-sbp",
          "text": "Systolic blood pressure 100 mmHg or lower",
          "type": "boolean"
        },
        {
          "linkId": "qsofa-score",
          "text": "qSOFA score (0–3)",
          "type": "integer",
          "readOnly": true,
          "extension": [
            {
              "url": "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-calculatedExpression",
              "valueExpression": {
                "language": "text/fhirpath",
                "expression": "iif((%resource.item.where(linkId='qsofa').item.where(linkId='qsofa-resp').answer.valueBoolean | %resource.item.where(linkId='qsofa').item.where(linkId='qsofa-mentation').answer.valueBoolean | %resource.item.where(linkId='qsofa').item.where(linkId='qsofa-sbp').answer.valueBoolean).exists(), (iif((%resource.item.where(linkId='qsofa').item.where(linkId='qsofa-resp').answer.valueBoolean), 1, 0) + iif((%resource.item.where(linkId='qsofa').item.where(linkId='qsofa-mentation').answer.valueBoolean), 1, 0) + iif((%resource.item.where(linkId='qsofa').item.where(linkId='qsofa-sbp').answer.valueBoolean), 1, 0)), {})"
              }
            }
          ]
        },
        {
          "linkId": "qsofa-risk",
          "text": "qSOFA result",
          "type": "string",
          "readOnly": true,
          "extension": [
            {
              "url": "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-calculatedExpression",
              "valueExpression": {
                "language": "text/fhirpath",
                "expression": "iif((%resource.item.where(linkId='qsofa').item.where(linkId='qsofa-resp').answer.valueBoolean | %resource.item.where(linkId='qsofa').item.where(linkId='qsofa-mentation').answer.valueBoolean | %resource.item.where(linkId='qsofa').item.where(linkId='qsofa-sbp').answer.valueBoolean).exists(), iif((iif((%resource.item.where(linkId='qsofa').item.where(linkId='qsofa-resp').answer.valueBoolean), 1, 0) + iif((%resource.item.where(linkId='qsofa').item.where(linkId='qsofa-mentation').answer.valueBoolean), 1, 0) + iif((%resource.item.where(linkId='qsofa').item.where(linkId='qsofa-sbp').answer.valueBoolean), 1, 0)).exists(), iif((iif((%resource.item.where(linkId='qsofa').item.where(linkId='qsofa-resp').answer.valueBoolean), 1, 0) + iif((%resource.item.where(linkId='qsofa').item.where(linkId='qsofa-mentation').answer.valueBoolean), 1, 0) + iif((%resource.item.where(linkId='qsofa').item.where(linkId='qsofa-sbp').answer.valueBoolean), 1, 0)) < 2, 'Lower risk', 'High risk'), {}), {})"
              }
            }
          ]
        }
      ]
    }
  ]
}