documentation:vocabulary:loinc
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| - | ===== LOINC ===== | + | The page has been moved here: https://github.com/OHDSI/Vocabulary-v5.0/wiki/Vocab.-LOINC |
| - | **Logical Observation Identifiers Names and Codes (LOINC)** is a standardized coding system for laboratory and clinical tests, procedures, observations, surveys, and corresponding results. | + | |
| - | + | ||
| - | ==== Sources ==== | + | |
| - | All LOINC source information is obtained from the following: | + | |
| - | + | ||
| - | 1. [[https://loinc.org/downloads/|LOINC Website]] that is supported by the Regenstrief Institute: | + | |
| - | * LOINC Table Core (Observations and Measurements) | + | |
| - | * LOINC Answers | + | |
| - | * LOINC Multiaxial Hierarchy | + | |
| - | * LOINC Document Ontology | + | |
| - | * LOINC Panels and Forms | + | |
| - | * LOINC Groups | + | |
| - | * LOINC to SNOMED mapping | + | |
| - | * LOINC Replacement Mapping | + | |
| - | 2. [[https://www.nlm.nih.gov/research/umls/mapping_projects/loinc_to_cpt_map.html|The National Library of Medicine (NLM) Website]]: | + | |
| - | * LOINC To CPT Mapping | + | |
| - | 3. [[https://loinc.org/file-access/download-id/9031/|LOINC Users' Guide]]: | + | |
| - | * Manual table of LOINC Classes | + | |
| - | + | ||
| - | ==== Concept Names ==== | + | |
| - | * Values of a “**long_common_name**” field are considered to be preferred terms for concept names. | + | |
| - | * Values of “**consumer_name**”, “**shortname**” and “**relatednames2**” fields reside in the concept synonym table as synonyms. | + | |
| - | + | ||
| - | ==== Standard Concepts ==== | + | |
| - | ^Source Concept Type^Standard Concept^ | + | |
| - | |LOINC Observations and Measurements|Standard| | + | |
| - | |LOINC Answers|Standard| | + | |
| - | |LOINC Hierarchy|Classification| | + | |
| - | |LOINC Classes|Classification| | + | |
| - | |LOINC Categories|Classification| | + | |
| - | |LOINC Groups|Classification| | + | |
| - | + | ||
| - | ==== Domains and Concept Classes ==== | + | |
| - | LOINC Concepts are located in such domains as “Observation”, “Measurement”, or “Meas Value”. | + | |
| - | + | ||
| - | Previously all concepts with a LOINC property of “**classtype**” with values “**1**” and “**2**” were considered to be Measurements. However, an initial analysis of such extended LOINC properties as “**property**”, **system**”, “**scale_type**”, “**class**”, “**method_typ**”, “**definitiondescription**” and “**survey_quest_text**” revealed that the LOINC domain distribution can be more accurate if used the combinations of LOINC properties. In turn, the Concept Class definition is interconnected with a defined Domain. | + | |
| - | + | ||
| - | So, they were assigned pursuant to the following criteria: | + | |
| - | + | ||
| - | ^Source^Depending on ^Domain^ | + | |
| - | |LOINC|CLASSTYPE=1 or 2|Measurement| | + | |
| - | | |CLASSTYPE=3 or 4|Observation| | + | |
| - | |LOINC Hierarchy|Concept_code>'LP76352-1'|Observation| | + | |
| - | | |Concept_code>='LP76352-1'|Measurement| | + | |
| - | |LOINC Class|Manual|Observation or Measurement| | + | |
| - | |LOINC Answer| |Meas Value| | + | |
| - | + | ||
| - | ==== Relationships ==== | + | |
| - | Relationships are defined within LOINC and between LOINC and CPT, and LOINC and SNOMED: | + | |
| - | + | ||
| - | ===1. Internal LOINC relationships === | + | |
| - | A purpose of Internal LOINC relationships is to build a LOINC Hierarchy, which makes it easier to sort and browse the database. | + | |
| - | + | ||
| - | ^Relationship^From^To^ | + | |
| - | |Is a|Descendant LOINC Class|Ancestor LOINC Class| | + | |
| - | |Is a|LOINC Group|LOINC Group Category| | + | |
| - | |Is a|LOINC Measurement or Observation|LOINC Class| | + | |
| - | |Is a|LOINC Measurement or Observation|LOINC Group| | + | |
| - | |Is a|Descendant LOINC Measurement or Observation|Ancestor LOINC Measurement or Observation| | + | |
| - | |Panel contains|LOINC Panel|LOINC Measurement or Observation| | + | |
| - | |Has Answer|LOINC Question|LOINC Answer| | + | |
| - | |Has type of service|LOINC Measurement or Observation|LOINC concept indicating a Type of Service (Document Ontology)| | + | |
| - | |Has subject matter|LOINC Measurement or Observation|LOINC concept indicating a Subject Matter Domain (Document Ontology)| | + | |
| - | |Has role|LOINC Measurement or Observation|LOINC concept indicating a Role (Document Ontology)| | + | |
| - | |Has setting|LOINC Measurement or Observation|LOINC concept indicating a Setting (Document Ontology)| | + | |
| - | |Has kind|LOINC Measurement or Observation|LOINC concept indicating a Kind of Document (Document Ontology)| | + | |
| - | |Concept replaced by|Updated LOINC concept|New LOINC concept| | + | |
| - | + | ||
| - | ^Reverse Relationship^From^To^ | + | |
| - | |Subsumes|Ancestor LOINC Class|Descendant LOINC Class| | + | |
| - | |Subsumes|LOINC Group Category|LOINC Group| | + | |
| - | |Subsumes|LOINC Class|LOINC Measurement or Observation| | + | |
| - | |Subsumes|LOINC Group|LOINC Measurement or Observation| | + | |
| - | |Subsumes|Ancestor LOINC Measurement or Observation|Descendant LOINC Measurement or Observation| | + | |
| - | |Contained in panel|LOINC Measurement or Observation|LOINC Panel| | + | |
| - | |Answer of|LOINC Answer|LOINC Question| | + | |
| - | |Type of service of|LOINC concept indicating a Type of Service (Document Ontology)|LOINC Measurement or Observation| | + | |
| - | |Subject matter of|LOINC concept indicating a Subject Matter Domain (Document Ontology)|LOINC Measurement or Observation| | + | |
| - | |Role of|LOINC concepts indicating a Role (Document Ontology)|LOINC Measurement or Observation| | + | |
| - | |Setting of|LOINC concepts indicating a Setting (Document Ontology)|LOINC Measurement or Observation| | + | |
| - | |Kind of|LOINC concepts indicating Kinds of Document (Document Ontology)|LOINC Measurement or Observation| | + | |
| - | |Concept replaces|New LOINC concept|Updated LOINC concept| | + | |
| - | + | ||
| - | ===2. LOINC to SNOMED relationships === | + | |
| - | These relationships are defined as "LOINC - SNOMED eq" between "LOINC Hierarchy" Concepts and SNOMED Concepts representing the entity that is measured. Note that only a small fraction (1%) is currently mapped. Also, note that some of the mappings seem to confuse the testing for drugs with the drugs themselves. | + | |
| - | + | ||
| - | ===3. LOINC to CPT relationships === | + | |
| - | These relationships are defined as "LOINC - CPT4 eq" between LOINC Lab Test Concepts and SNOMED Concepts. Note that only a small fraction (2%) is mapped. | + | |
| - | + | ||
| - | === Hierarchy === | + | |
| - | All internal "Is a" and "Panel contains" relationships participate in the creation of the CONCEPT_ANCESTOR table, creating an internal hierarchy within LOINC not connected to the larger Measurement or Observation Domain space. | + | |
| - | + | ||
documentation/vocabulary/loinc.1556796825.txt.gz · Last modified: 2019/05/02 11:33 by ptalapova
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