documentation:cdm:concept_ancestor
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documentation:cdm:concept_ancestor [2017/08/17 15:20] clairblacketer |
documentation:cdm:concept_ancestor [2017/10/02 19:31] aostropolets |
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| ===== CONCEPT_ANCESTOR table ===== | ===== CONCEPT_ANCESTOR table ===== | ||
| - | **The CDM documentation is now being housed on [[https://github.com/OHDSI/CommonDataModel/wiki|github]]. The most recent release is [[https://github.com/OHDSI/CommonDataModel/releases/tag/v5.2.-bugfix.1|v5.2]]** | + | **THIS IS OUTDATED. All documentation is now on the [[https://github.com/OHDSI/CommonDataModel/wiki|github wiki]]. Please refer there or to the [[projects:workgroups:cdm-wg|CDM working group]] for more information** |
| The CONCEPT_ANCESTOR table is designed to simplify observational analysis by providing the complete hierarchical relationships between Concepts. Only direct parent-child relationships between Concepts are stored in the CONCEPT_RELATIONSHIP table. To determine higher level ancestry connections, all individual direct relationships would have to be navigated at analysis time. The CONCEPT_ANCESTOR table includes records for all parent-child relationships, as well as grandparent-grandchild relationships and those of any other level of lineage. Using the CONCEPT_ANCESTOR table allows for querying for all descendants of a hierarchical concept. For example, drug ingredients and drug products are all descendants of a drug class ancestor. | The CONCEPT_ANCESTOR table is designed to simplify observational analysis by providing the complete hierarchical relationships between Concepts. Only direct parent-child relationships between Concepts are stored in the CONCEPT_RELATIONSHIP table. To determine higher level ancestry connections, all individual direct relationships would have to be navigated at analysis time. The CONCEPT_ANCESTOR table includes records for all parent-child relationships, as well as grandparent-grandchild relationships and those of any other level of lineage. Using the CONCEPT_ANCESTOR table allows for querying for all descendants of a hierarchical concept. For example, drug ingredients and drug products are all descendants of a drug class ancestor. | ||
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| |min_levels_of_separation|Yes|integer|The minimum separation in number of levels of hierarchy between ancestor and descendant concepts. This is an attribute that is used to simplify hierarchic analysis.| | |min_levels_of_separation|Yes|integer|The minimum separation in number of levels of hierarchy between ancestor and descendant concepts. This is an attribute that is used to simplify hierarchic analysis.| | ||
| |max_levels_of_separation|Yes|integer|The maximum separation in number of levels of hierarchy between ancestor and descendant concepts. This is an attribute that is used to simplify hierarchic analysis.| | |max_levels_of_separation|Yes|integer|The maximum separation in number of levels of hierarchy between ancestor and descendant concepts. This is an attribute that is used to simplify hierarchic analysis.| | ||
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| + | A path between two concepts can be characterized by the sequence of relationships that need to be traversed in order to reach a descendant concept from an ancestor concept. | ||
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| + | For example, for concepts | ||
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| + | ^descendant_concept_id^descendant_concept_name^ancestor_concept_id^ancestor_concept_name^min_levels_of_separation^max_levels_of_separation^ | ||
| + | |4047584|Lengthening of extraocular muscle|4301351|Surgical procedure|3|6| | ||
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| + | the shortest path in concept_relationship will be : | ||
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| + | 4047584 Lengthening of extraocular muscle **Is a** 4214521 Strabismus **Is a** | ||
| + | 4132804 Surgical procedure for clinical finding and/or disorder **Is a** 4301351Surgical procedure | ||
| + | |||
| + | the longest: | ||
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| + | 4047584 Lengthening of extraocular muscle **Is a** 4214521 Strabismus surgery **Is a** | ||
| + | 4070457 Operation on extraocular muscle **Is a** 4333146 Surgical procedure on orbit **Is a** | ||
| + | 4154279 Surgical procedure on eye region **Is a** 4233946 Operative procedure on head **Is a** | ||
| + | 4301351 Surgical procedure | ||
| ==== Conventions ==== | ==== Conventions ==== | ||
documentation/cdm/concept_ancestor.txt ยท Last modified: 2017/10/02 21:29 by aostropolets
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