| Notation | Definition |
|---|---|
| SG | Set containing all the gold standard SDOH concepts from the UMLS that were extracted by the annotators (901). |
| SK | Set containing all the SDOH concepts extracted from UMLS using keyword search (117,199). This set also includes the LOINC concepts that were already identified as SDOH. |
| Sg R,hop=n | Set containing all the SDOH concepts extracted using graph search via nth hop. After hop = 2, this set consisted of 1,182,450 UMLS concepts. |
| SF | Set that combines the SDOH concepts of SK, SGR,hop=1, and SGR,hop=2. |
| STYS | Semantic type groups that are selected for filtering the UMLS concepts to get relevant SDOH concepts (28). |
| SF′ | Final set after semantic type group filtering using STYS. |
| STYC | Selected semantic type groups that could be directly mapped to a SDOH category (18). |
| SC | Set of SDOH concepts that could be mapped to a SDOH category using STYC. (65,276) |
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