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--- documentation:vocabulary:loinc [2019/05/02 11:33] – ptalapova
+++ documentation:vocabulary:loinc [2024/09/03 11:19] (current) – jcruz
@@ Line 1: / Line 1: @@
 ===== LOINC =====
-**Logical Observation Identifiers Names and Codes (LOINC)** is a standardized coding system for laboratory and clinical tests, procedures, observations, surveys, and corresponding results.
+Thank you for visiting the wiki! This page has moved to https://github.com/OHDSI/Vocabulary-v5.0/wiki/Vocab.-LOINC
-==== Sources ====
-All LOINC source information is obtained from the following:
-. [[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
-. [[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
-. [[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.