Quality Measure Implementation Guide
1.0.0 - STU 1

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

## Extension: CQM Population Basis

Official URL: http://hl7.org/fhir/uv/cqm/StructureDefinition/cqm-populationBasis | Version: 1.0.0
Standards status: Trial-use | Maturity Level: 4 | Computable Name: CQMPopulationBasis
Other Identifiers: OID:2.16.840.1.113883.4.642.40.61.42.21

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. Note that the subject of a measure can be found in the element subject[x].

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)

- Element ID: `Measure`
- Element ID: `Measure.group`
- Element ID: `Measure.group.population`

Usage info

Usages:

- Use this Extension: CQM Computable Measure and CQM Ratio Measure
- Examples for this Extension: BCSComponent, CCSComponent, EXM108, EXM124... Show 13 more, EXM125, EXM130, EXM146, EXM55, MeasureEXM, EXMRatioMeasure, HBPComponent, MultiRateExample, PVSComponent, TSCComponent, Terminology_FHIR, MeasureAgeStratifiedExample and PublishableMeasureEXM

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 | C | 0..* | Extension | What type of population Constraints: popBasis-1
url |  | 1..1 | uri | "http://hl7.org/fhir/uv/cqm/StructureDefinition/cqm-populationBasis"
value[x] |  | 0..1 |  | Value of extension Binding: FHIRAllTypes (required): The type of elements in the population
valueCode |  |  | code |
valueDataRequirement |  |  | DataRequirement |
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension | C | 0..* | Extension | What type of population Constraints: popBasis-1
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-populationBasis"
value[x] |  | 0..1 |  | Value of extension Binding: FHIRAllTypes (required): The type of elements in the population
valueCode |  |  | code |
valueDataRequirement |  |  | DataRequirement |
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type code, DataRequirement: 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. Note that the subject of a measure can be found in the element subject[x].

Maturity: 4

Differential View

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension | C | 0..* | Extension | What type of population Constraints: popBasis-1
url |  | 1..1 | uri | "http://hl7.org/fhir/uv/cqm/StructureDefinition/cqm-populationBasis"
value[x] |  | 0..1 |  | Value of extension Binding: FHIRAllTypes (required): The type of elements in the population
valueCode |  |  | code |
valueDataRequirement |  |  | DataRequirement |
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension | C | 0..* | Extension | What type of population Constraints: popBasis-1
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-populationBasis"
value[x] |  | 0..1 |  | Value of extension Binding: FHIRAllTypes (required): The type of elements in the population
valueCode |  |  | code |
valueDataRequirement |  |  | DataRequirement |
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type code, DataRequirement: 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. Note that the subject of a measure can be found in the element subject[x].

Maturity: 4

Other representations of profile: CSV, Excel, Schematron

#### Terminology Bindings

Path | Conformance | ValueSet | URI
Extension.value[x] | required | FHIRAllTypes `http://hl7.org/fhir/ValueSet/all-types` From the FHIR Standard

#### 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() |
popBasis-1 | error | Extension | If DataRequirement.type is present, it may only contain the elements 'profile' and 'codeFilter'. : value.exists() and value.is(DataRequirement) implies ( value.as(DataRequirement).type.exists() and value.as(DataRequirement).limit.empty() and value.as(DataRequirement).sort.empty() and value.as(DataRequirement).dateFilter.empty() and value.as(DataRequirement).subject.empty() and value.as(DataRequirement).mustSupport.empty()) |