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Table 12 Top areas of eight hierarchies in SNOMED CT (2020-01-31 release)

From: Missing lateral relationships in top-level concepts of an ontology

Hierarchy # concepts # Concepts in top area %
Body structure 39,323 27,224 69.2
Clinical finding 114,397 6427 5.6
Event 3189 3006 94.3
Observable entity 9144 8744 95.6
Pharmaceutical / biologic product 22,244 418 1.9
Procedure 58,154 2628 4.7
Situation with explicit context 4739 61 1.3
Specimen 1702 34 2.0