Modified Rankin Scale score 0-2 at 90 days after treatment

{
  "resourceType" : "EvidenceVariable",
  "id" : "example-mRS0-2-at-90days",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n      <p>\n        &quot;mRS 0-2 at 90 days&quot; is an outcome, defined by a CQL expression, used in expressing what an Evidence is about.\n      </p>\n\t</div>"
  },
  "title" : "Modified Rankin Scale score 0-2 at 90 days after treatment",
  "status" : "draft",
  "actual" : true,
  "characteristic" : [{
    "description" : "mRS 0-2 at 90 days",
    "definitionExpression" : {
      "description" : "mRS 0-2",
      "language" : "text/cql",
      "expression" : "[\"Observation\": code in \"75859-9|LOINC\"] mRS where mRS.value between 0 and 2"
    },
    "timeFromEvent" : [{
      "eventCodeableConcept" : {
        "coding" : [{
          "system" : "http://hl7.org/fhir/evidence-variable-event",
          "code" : "study-start",
          "display" : "Study Start"
        }]
      },
      "quantity" : {
        "value" : 90,
        "unit" : "day",
        "system" : "http://unitsofmeasure.org",
        "code" : "d"
      }
    }]
  }],
  "handling" : "dichotomous"
}