Table 2.
Comparison of downloaded versus derived SNOMED CT value set contents.
| Condition name | SNOMED CT concepts included in value set | Extensional concept discrepancies | ||||||
| Extensionala (n) | Extensionalb (n) | Ratio (derived/ VSAC) | SNOMED CT concepts included in VSAC download (%) | Total (n) | Only in VSAC download (n) | Only in intensional-derived (n) | ||
| CKD-5c and ESRDd | 5 | 27 | 5.4 | 19 | 22 | 0 | 22 | |
| Hypertension | 12 | 233 | 19.4 | 5 | 223 | 1 | 222 | |
| Kidney transplant | 8 | 36 | 4.5 | 22 | 40 | 6 | 34 | |
| Pregnancy, narrow | 35 | 156 | 4.5 | 22 | 121 | 0 | 121 | |
| Pregnancy, broade | 35 | 1262 | 36.1 | 3 | 1227 | 0 | 1227 | |
| Bipolar disorder | 99 | 109 | 1.1 | 91 | 10 | 0 | 10 | |
| Depression and dysthymia | 72 | 151 | 2.1 | 48 | 79 | 0 | 79 | |
| Personality disorders | 26 | 48 | 1.8 | 54 | 22 | 0 | 22 | |
| Diabetes | 89 | 441 | 5 | 20 | 358 | 3 | 355 | |
| Prostate cancer | 12 | 19 | 1.6 | 63 | 11 | 2 | 9 | |
| Pain related to prostate cancer | 17 | 20 | 1.2 | 85 | 3 | 0 | 3 | |
| Overall sum, ratio, or % | 375 | 1240 | 3.3 | 30 | 889 | 12 | 877 | |
| Set of 10 conditions | ||||||||
| Overall median | 21.5 | 78.5 | 3.3 | 35 | 31 | 0 | 28 | |
| Overall minimum | 5 | 19 | 1.1 | 5 | 3 | 0 | 3 | |
| Overall maximum | 99 | 441 | 19.4 | 91 | 358 | 6 | 355 | |
| Overall range | 94 | 422 | 18.3 | 86 | 355 | 6 | 352 | |
aDownload from Value Set Authority Center (VSAC).
bDerived from intensional.
cCKD-5: chronic kidney disease, stage 5.
dESRD: end-stage renal disease.
eNot included in summary calculated measures (overall sum, median, minimum, maximum, range).