<status value="draft"/> <experimental value="false"/> <date value="2020-12-28T15:55:11+10:00"/> <publisher value="Clinical Decision Support"/> <contact> <name value="Clinical Decision Support"/> <telecom> <system value="url"/> <value value="http://www.hl7.org/Special/committees/dss"/> </telecom> </contact> <description value="The type of study the evidence was derived from."/> <jurisdiction> <coding> <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/> <code value="001"/> <display value="World"/> </coding> </jurisdiction> <caseSensitive value="true"/> <valueSet value="http://hl7.org/fhir/ValueSet/study-type|4.0.1"/> <content value="complete"/> <concept> <code value="RCT"/> <display value="randomized trial"/> <definition value="randomized controlled trial."/> </concept> <concept> <code value="CCT"/> <display value="controlled trial (non-randomized)"/> <definition value="controlled (but not randomized) trial."/> </concept> <concept> <code value="cohort"/> <display value="comparative cohort study"/> <definition value="observational study comparing cohorts."/> </concept> <concept> <code value="case-control"/> <display value="case-control study"/> <definition value="case-control study."/> </concept> <concept> <code value="series"/> <display value="uncontrolled cohort or case series"/> <definition value="uncontrolled cohort or case series."/> </concept> <concept> <code value="case-report"/> <display value="case report"/> <definition value="a single case report."/> </concept> <concept> <code value="mixed"/> <display value="mixed methods"/> <definition value="a combination of 1 or more types of studies."/> </concept> </CodeSystem>

This code system http://terminology.hl7.org/CodeSystem/study-type defines the following codes:

Code	Display	Definition
RCT	randomized trial	randomized controlled trial.
CCT	controlled trial (non-randomized)	controlled (but not randomized) trial.
cohort	comparative cohort study	observational study comparing cohorts.
case-control	case-control study	case-control study.
series	uncontrolled cohort or case series	uncontrolled cohort or case series.
case-report	case report	a single case report.
mixed	mixed methods	a combination of 1 or more types of studies.