documentation:vocabulary:loinc
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documentation:vocabulary:loinc [2015/10/11 21:54] cgreich [Concept Classes] |
documentation:vocabulary:loinc [2022/01/27 10:49] adavydov |
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| - | ===== LOINC ===== | + | The page has been moved here: https://github.com/OHDSI/Vocabulary-v5.0/wiki/Vocab.-LOINC |
| - | LOINC is a coding system for lab tests, but also for surveys, tests and other clinical procedures or activities that create a result, usually for a diagnostic purpose. | + | |
| - | + | ||
| - | ==== Sources ==== | + | |
| - | All LOINC source information is obtained from the LOINC websites that is supported by the Regenstrief institute, except the mapping between LOINC and CPT4, which is provided by the NLM: | + | |
| - | Generic LOINC Concept | + | |
| - | - LOINC Multiaxial Hierarchy | + | |
| - | - LOINC Forms and LOINC Answers | + | |
| - | - LOINC Panel | + | |
| - | - LOINC Class | + | |
| - | - LOINC to CPT mapping | + | |
| - | - LOINC to SNOMED mapping | + | |
| - | + | ||
| - | ==== Standard Concepts ==== | + | |
| - | All LOINC Concepts are Standard Concepts, while Concepts of the Source LOINC Class, LOINC Hierarchy are Classification Concepts. | + | |
| - | + | ||
| - | ==== Concept Classes ==== | + | |
| - | Concepts in the LOINC vocabulary are assigned Concept Class as following: | + | |
| - | ^Source^Resourced^Concept Class^Description^ | + | |
| - | |LOINC|CLASSTYPE=1|Lab Test|The Universal Lab Order Codes Value Set contains the most frequent lab orders| | + | |
| - | | |CLASSTYPE=2|Clinical Observation|Anything that can be tested, measured, or observed about a patient without removing a specimen| | + | |
| - | | |CLASSTYPE=3|Claims Attachment|Information necessary to adjudicate claims for ambulance, rehabilitation, or emergency room services| | + | |
| - | | |CLASSTYPE=4|Survey|Set of questions on a survey or form| | + | |
| - | | |CLASS|LOINC Class|Similar to the Concept Classes of each LOINC Concept, but more detailed and hierarchical| | + | |
| - | |LOINC Hierarchy| |LOINC Hierarchy|Similar to LOINC Class, but separate hierarchical system| | + | |
| - | |LOINC Answer|AnswerStringID|Answer| | | + | |
| - | + | ||
| - | ==== Domains ==== | + | |
| - | LOINC Concepts can have a Measurement or Observation Domain. This is assigned as following: | + | |
| - | ^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: | + | |
| - | + | ||
| - | === Internal LOINC relationships === | + | |
| - | - "Is a" relationships between LOINC Concepts and LOINC Hierarchy and LOINC Class Concepts | + | |
| - | - "Has Answer" relationships between LOINC Concepts and LOINC Answer Concepts | + | |
| - | - "Panel contains" relationships between LOINC Concepts | + | |
| - | + | ||
| - | === 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% as of late 2015) are currently mapped. Also, note that some of the mappings seem to confuse the testing for drugs with the drugs themselves. | + | |
| - | + | ||
| - | === 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 franction (2% as of late 2015) are 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.txt · Last modified: 2024/09/03 11:19 by jcruz
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