"Dead or functionally dependent at 90 days" is an outcome used in expressing what an Evidence is about.

<status value="draft"/><description value="Dead or functionally dependent at 90 days"/><actual value="false"/><characteristic><description value="Dead or functionally dependent at 90 days"/><definitionByCombination><code value="any-of"/><characteristic><description value="functionally dependent at 90 days"/><definitionCodeableConcept><coding><system value="http://snomed.info/sct"/><code value="718705001"/><display value="Functionally dependent (finding)"/></coding></definitionCodeableConcept><timeFromEvent><eventCodeableConcept><coding><system value="http://hl7.org/fhir/evidence-variable-event"/><code value="study-start"/><display value="Study Start"/></coding></eventCodeableConcept><quantity><value value="90"/><unit value="day"/><system value="http://unitsofmeasure.org"/><code value="d"/></quantity></timeFromEvent></characteristic><characteristic><description value="dead at 90 days"/><definitionCodeableConcept><coding><system value="http://snomed.info/sct"/><code value="419099009"/><display value="Dead (finding)"/></coding></definitionCodeableConcept><timeFromEvent><quantity><value value="90"/><unit value="day"/><system value="http://unitsofmeasure.org"/><code value="d"/></quantity></timeFromEvent></characteristic></definitionByCombination></characteristic><handling value="dichotomous"/></EvidenceVariable>