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Extension: CQFM Population Basis

Official URL: http://hl7.org/fhir/us/cqfmeasures/StructureDefinition/cqfm-populationBasis				Version: 3.0.0
Active as of 2019-02-13				Computable Name: CQFMPopulationBasis

The population basis specifies the type of elements in the population. For a subject-based measure, this is boolean (because the subject and the population basis are the same, and the population criteria define yes/no values for each individual in the population). For measures that have a population basis that is different than the subject, this element specifies the type of the population basis. For example, an encounter-based measure has a subject of Patient and a population basis of Encounter, and the population criteria all return lists of Encounters.

A measure specification needs to be able to specify the expected result type of each population criteria. This value SHALL be consistent with the result type of all population-level criteria in the measure.

Context of Use

This extension may be used on the following element(s):

• Measure
• Measure.group

Usage info

Usage:

• Use this Extension: CQFM Computable Measure, CQFM Ratio Measure
• Examples for this Extension: BCSComponent, BreastCancerScreeningFHIR, CCSComponent, HBPComponent, PVSComponent, TSCComponent, EXM55, MeasureEXM, EXM124, EXM125, EXM130, EXM146, EXM55, PublishableMeasureEXM, EXMRatioMeasure, RiskAdjustment_FHIR2, Terminology_FHIR, VTE_1_FHIR, MultiRateExample

Formal Views of Extension Content

Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.

 

Other representations of profile: CSV, Excel, Schematron

Terminology Bindings

Path	Conformance	ValueSet
Extension.value[x]	required	FHIRAllTypes

Constraints

Id	Grade	Path	Details	Requirements
ele-1	error	Extension	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	Extension	Must have either extensions or value[x], not both : extension.exists() != value.exists()
ele-1	error	Extension.extension	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	Extension.extension	Must have either extensions or value[x], not both : extension.exists() != value.exists()
ele-1	error	Extension.value[x]	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())