Table 2.
Number of SNOMED CT concepts, medcodes, and patients included using different relationships in value set phenotype definitions. Among concepts linked to “Diabetes mellitus” by the relationship “Has focus,” the concept “Diabetes mellitus screening” captured the greatest number of additional patients (1820)
| Phenotype | Relationship | N concepts | N CPRD medcodes | N patients | N (%) additional patients compared to self and “is a” |
|---|---|---|---|---|---|
| Diabetes mellitus | Self and “Is a” | 131 | 409 | 26 681 | – |
| Associated procedure | 10 | 16 | 5469 | 47 (0.18%) | |
| Due to | 70 | 338 | 2590 | 30 (0.11%) | |
| Associated with | 40 | 115 | 7308 | 40 (0.15%) | |
| Has focus | 4 | 8 | 7991 | 2051 (7.69%) | |
| Associated finding | 2 | 4 | 1107 | 4 (0.01%) | |
| Associated etiologic finding | 1 | 1 | 57 | 1 (< 0.01%) | |
| All | 258 | 895 | 28 849 | 2168 (8.13%) | |
| Asthma | Self and “Is a” | 49 | 110 | 57 287 | – |
| Has focus | 4 | 4 | 784 | 39 (0.07%) | |
| All | 53 | 114 | 57 326 | 39 (0.07%) | |
| Heart failure | Self and “Is a” | 43 | 84 | 9501 | – |
| Associated finding | 1 | 1 | 82 | 20 (0.21%) | |
| All | 44 | 85 | 9521 | 20 (0.21%) |