Table 3.
The top six UMLS semantic groups and their frequency in the evaluation corpus
| UMLS semantic groups | Representative UMLS semantic types | Frequency |
| Concepts and ideas (45.5%) | Temporal concept | 17.0% |
| Qualitative concept | 10.8% | |
| Functional concept | 6.4% | |
| Spatial concept | 5.0% | |
| Quantitative concept | 3.6% | |
| Idea or concept | 1.5% | |
| Procedures (17.3%) | Therapeutic or preventive procedure | 10.8% |
| Research activity | 3.5% | |
| Healthcare activity | 1.9% | |
| Chemicals and drugs (14.1%) | Pharmacologic substance | 11.8% |
| Antibiotic | 0.7% | |
| Hormone | 0.2% | |
| Disorders (7.9%) | Disease or syndrome | 4.88% |
| Sign or symptom | 1.12% | |
| Finding | 0.61% | |
| Neoplastic process | 0.41% | |
| Pathologic function | 0.2% | |
| Anatomy (4.6%) | Body part, organ, or organ component | 1.32% |
| Body location or region | 1.32% | |
| Body space or junction | 0.81% | |
| Body system | 0.41% | |
| Living beings (4.0%) | Patient or disabled group | 2.14% |
| Human | 0.81% | |
| Professional or occupational group | 0.41% |
UMLS, unified medical language systems.