Quality Measure Implementation Guide, published by HL7 International / Clinical Quality Information. This guide is not an authorized publication; it is the continuous build for version 1.0.1-cibuild built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-cqm/ and changes regularly. See the Directory of published versions

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Extension: CQM Aggregate Method

Specifies which method to be used to aggregate the measure observation values.

Context of Use

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

• Element ID: Measure.group.population

Usage info

Usages:

• Use this Extension: CQM Continuous Variable Measure and CQM Ratio Measure
• Examples for this Extension: EXM55, MeasureEXM, EXMRatioMeasure and MultiRateExample

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description Differentials, Snapshots, and other representations.

• Differential Table
• Snapshot Table
• Statistics/References
• All

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Extension		0..1	Extension	Aggregate with
url		1..1	uri	"http://hl7.org/fhir/uv/cqm/StructureDefinition/cqm-aggregateMethod"
value[x]		0..1	code	Value of extension Binding: Measure Aggregate Method (preferred): Aggregation method for a measure (e.g. sum, average, median, minimum, maximum, count)
Documentation for this format

Terminology Bindings (Differential)

Path	Status	Usage	ValueSet	Version	Source
Extension.value[x]	Base	preferred	Measure Aggregate Method	📦2.0.0	THO v6.5

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Extension		0..1	Extension	Aggregate with
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
url		1..1	uri	"http://hl7.org/fhir/uv/cqm/StructureDefinition/cqm-aggregateMethod"
value[x]		0..1	code	Value of extension Binding: Measure Aggregate Method (preferred): Aggregation method for a measure (e.g. sum, average, median, minimum, maximum, count)
Documentation for this format

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
Extension.value[x]	Base	preferred	Measure Aggregate Method	📦2.0.0	THO v6.5

Constraints

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

Summary

Simple Extension with the type code: Specifies which method to be used to aggregate the measure observation values.

Maturity: 4

Differential ViewDifferential View

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Extension		0..1	Extension	Aggregate with
url		1..1	uri	"http://hl7.org/fhir/uv/cqm/StructureDefinition/cqm-aggregateMethod"
value[x]		0..1	code	Value of extension Binding: Measure Aggregate Method (preferred): Aggregation method for a measure (e.g. sum, average, median, minimum, maximum, count)
Documentation for this format

Terminology Bindings (Differential)

Path	Status	Usage	ValueSet	Version	Source
Extension.value[x]	Base	preferred	Measure Aggregate Method	📦2.0.0	THO v6.5

Snapshot View

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Extension		0..1	Extension	Aggregate with
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
url		1..1	uri	"http://hl7.org/fhir/uv/cqm/StructureDefinition/cqm-aggregateMethod"
value[x]		0..1	code	Value of extension Binding: Measure Aggregate Method (preferred): Aggregation method for a measure (e.g. sum, average, median, minimum, maximum, count)
Documentation for this format

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
Extension.value[x]	Base	preferred	Measure Aggregate Method	📦2.0.0	THO v6.5

Constraints

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

Summary

Simple Extension with the type code: Specifies which method to be used to aggregate the measure observation values.

Maturity: 4

Other representations of profile: CSV, Excel, Schematron