Table III.
RhCE-negative frequencies from several data sources
| Study period | Present study - BISS June 2016 ~ June 2022 |
Present study - KRBP July 2013 ~ June 2022 |
Previous study* Not provided |
||||
|---|---|---|---|---|---|---|---|
| No. | Frequency | Required units** | No. | Frequency | No. | Frequency | |
| C- | 27,295/213,691 | 12.8% | 8 | 46/94 | 48.9% | 39/305 | 12.8% |
| E- | 104,984/213,691 | 49.1% | 3 | 3,027/4,194 | 72.2% | 159/305 | 52.1% |
| c- | 89,651/213,691 | 42.0% | 3 | 283/425 | 66.6% | 127/305 | 41.6% |
| e- | 19,539/213,691 | 9.1% | 11 | 64/82 | 78.1% | 35/305 | 11.5% |
| C-e- | 19,379/213,691 | 9.1% | 11 | 1,091/1,880 | 58.0% | 35/305 | 11.5% |
| E-c- | 88,993/213,691 | 41.6% | 3 | 2,957/4,251 | 69.6% | 126/305 | 41.3% |
*
Reference No. 8. Hong YJ et al., Ann Hematol, 2016.
**
Average number of units required for typing to obtain one antigen(s)-negative unit.
BISS: blood information sharing system; KRBP: Korean Rare Blood Program.