The Measure Report resource draws requirements from the Health Level Seven International (HL7) Clinical Document Architecture (CDA) Release 2 (R2) Implementation Guide: Quality Reporting Document Architecture – Category 1 (QRDA I) Draft Standard for Trial Use (DSTU) Release 3 (US Realm) and the HL7 Implementation Guide for CDA R2: Quality Reporting Document Architecture – Category III (QRDA III), DSTU Release 1 implementation guides.
Note that this resource is a special case of the more general notion of a query evaluation result. However, because the general case requires the ability to represent arbitrary content, this resource uses a simple indicator structure to describe population sizes for each population type defined in the measure. The intent is to be able to represent the more general case as well, either by generalizing this resource, or by making this structure a profile of a more general resource, and we are actively seeking comments about what approaches might be taken to achieve that aim.
Although the Measure Report is conceptually an Observation, there is enough specific information required to support the quality reporting use case to warrant a separate resource. The resource is differentiated from a general purpose query result because it communicates specific information related to quality measurement evaluation that would be difficult to convey generally without imposing some other structure on top of the general results.