Table 4.
The list of high-level categories (“primary hierarchies”) in SNOMED CTwith their frequency distribution and corresponding top-level class
| Category | Frequency | Corresponding top-level class |
|---|---|---|
| Administrative concept | 54 | Qualifier value |
| Assessment scale | 870 | Staging and scales |
| Attribute | 991 | Attribute |
| Body structure | 25,395 | Body structure |
| Cell | 603 | Body structure |
| Cell structure | 501 | Body structure |
| Context-dependent category | 3,649 | Context-dependent categories |
| Disorder | 62,301 | Clinical finding |
| Environment | 1,007 | Environments and geographical locations |
| Environment/location | 1 | Environments and geographical locations |
| Ethnic group | 254 | Social context |
| Event | 87 | Events |
| Finding | 33,304 | Clinical finding |
| Geographic location | 612 | Environments and geographical locations |
| Inactive concept | 7 | Special concept |
| Life style | 21 | Social context |
| Morphologic abnormality | 4,153 | Body structure |
| Namespace concept | 5 | Special concept |
| Navigational concept | 165 | Special concept |
| Observable entity | 7,274 | Observable entity |
| Occupation | 4,153 | Social context |
| Organism | 25,026 | Organism |
| Person | 302 | Social context |
| Physical force | 199 | Physical force |
| Physical object | 4,201 | Physical object |
| Procedure | 42,782 | Procedure |
| Product | 16,867 | Pharmaceutical/biologic product |
| Qualifier value | 8,080 | Qualifier value |
| Regime/therapy | 3,284 | Procedure |
| Religion/philosophy | 145 | Social context |
| Social concept | 21 | Social context |
| Special concept | 1 | Special concept |
| Specimen | 1,053 | Specimen |
| Staging scale | 15 | Staging and scales |
| Substance | 22,267 | Substance |
| Tumor staging | 213 | Staging and scales |