Current Build Code System

Clinical Decision Support Work Group Maturity Level: 0Trial Use Use Context: Any

This is a code system defined by the FHIR project.


Defining URL:

The type of a specific statistic.

Committee:Clinical Decision Support Work Group
OID:2.16.840.1.113883.4.642.1.0 (for OID based terminology systems)
Source ResourceXML / JSON

This Code system is used in the following value sets:

The type of a specific statistic.

This code system defines the following codes:

relative-RR relative riskrelative risk (a type of relative effect estimate).
relative-OR odds ratioodds ratio (a type of relative effect estimate).
relative-HR hazard ratiohazard ratio (a type of relative effect estimate).
absolute-ARD absolute risk differenceabsolute risk difference (a type of absolute effect estimate).
absolute-MeanDiff mean differencemean difference (a type of absolute effect estimate).
absolute-SMD standardized mean differencestandardized mean difference (a type of absolute effect estimate).
absolute-MedianDiff median differencemedian difference (a type of absolute effect estimate).
proportion proportiondichotomous measure (present of absent) reported as a ratio compared to the denominator of 1 (A percentage is a proportion with denominator of 100).
derivedProportion derivedProportionA special use case where the proportion is derived from a formula rather than derived from summary evidence.
mean Meancontinuous numerical measure reported as an average.
median Mediancontinuous numerical measure reported as the middle of the range.
count Countdescriptive measure reported as total number of items.
descriptive descriptivedescriptive measure reported as narrative.


See the full registry of code systems defined as part of FHIR.

Explanation of the columns that may appear on this page:

LevelA few code lists that FHIR defines are hierarchical - each code is assigned a level. See Code System for further information.
SourceThe source of the definition of the code (when the value set draws in codes defined elsewhere)
CodeThe code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract')
DisplayThe display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application
DefinitionAn explanation of the meaning of the concept
CommentsAdditional notes about how to use the code