<status value="draft"/> <experimental value="false"/> <date value="2020-04-09T21:10:28+00:00"/> <publisher value="Health Level Seven International"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org"/> </telecom> <telecom> <system value="email"/> <value value="hq@HL7.org"/> </telecom> </contact> <description value="Statement about the degree of clinical certainty that a specific substance was the cause of the manifestation in a reaction event."/> <copyright value="This material derives from the HL7 Terminology (THO). THO is copyright ©1989+ Health Level Seven International and is made available under the CC0 designation. For more licensing information see: https://terminology.hl7.org/license"/> <caseSensitive value="true"/> <valueSet value="http://terminology.hl7.org/ValueSet/reaction-event-certainty"/> <content value="complete"/> <concept> <code value="unlikely"/> <display value="Unlikely"/> <definition value="There is a low level of clinical certainty that the reaction was caused by the identified substance."/> </concept> <concept> <code value="likely"/> <display value="Likely"/> <definition value="There is a high level of clinical certainty that the reaction was caused by the identified substance."/> </concept> <concept> <code value="confirmed"/> <display value="Confirmed"/> <definition value="There is a very high level of clinical certainty that the reaction was due to the identified substance, which may include clinical evidence by testing or rechallenge."/> </concept> <concept> <code value="unknown"/> <display value="Unknown"/> <definition value="The clinical certainty that the reaction was caused by the identified substance is unknown. It is an explicit assertion that certainty is not known."/> </concept> </CodeSystem>

This case-sensitive code system http://terminology.hl7.org/CodeSystem/reaction-event-certainty defines the following codes:

Code	Display	Definition
unlikely	Unlikely	There is a low level of clinical certainty that the reaction was caused by the identified substance.
likely	Likely	There is a high level of clinical certainty that the reaction was caused by the identified substance.
confirmed	Confirmed	There is a very high level of clinical certainty that the reaction was due to the identified substance, which may include clinical evidence by testing or rechallenge.
unknown	Unknown	The clinical certainty that the reaction was caused by the identified substance is unknown. It is an explicit assertion that certainty is not known.