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 case series | uncontrolled case series. |
case-report | case report | a single case report. |
RCTandCohort | mixed RCT and cohort | a combination of 1 or more RCTs and cohorts. |
cross-section | cross sectional study | uncontrolled cohort. |