Quality Measure Implementation Guide
1.0.0 - STU 1

Quality Measure Implementation Guide - Downloaded Version null See the Directory of published versions

## Extension: CQM Aggregate Method

Official URL: http://hl7.org/fhir/uv/cqm/StructureDefinition/cqm-aggregateMethod | Version: 1.0.0
Standards status: Trial-use | Maturity Level: 4 | Computable Name: CQMAggregateMethod
Other Identifiers: OID:2.16.840.1.113883.4.642.40.61.42.1

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

For continuous variable measures, the measure observation definition needs to be able to specify how the observations should be aggregated.

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

- Differential Table
- Snapshot Table
- Statistics/References
- All

This structure is derived from Extension

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

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

This structure is derived from Extension

Summary

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

Maturity: 4

Differential View

This structure is derived from Extension

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

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

This structure is derived from Extension

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

#### Terminology Bindings

Path | Conformance | ValueSet | URI
Extension.value[x] | preferred | MeasureAggregateMethod `http://terminology.hl7.org/ValueSet/measure-aggregate-method`

#### Constraints

Id | Grade | Path(s) | Details | Requirements
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() |