Number (%) of participants in the proficiency tests for Lewis antigen typing
| Trial (specimen) | Category | Antigen | Lewis type | ||
|---|---|---|---|---|---|
| Le(a) | Le(b) | ||||
| 1st (BGS-21-02) | No. of participants | 22 | 22 | Le(a–b+) | 1 (4.5) |
| Negative | 22 (100.0) | 21 (95.5) | Le(a–b–) | 21 (95.5) | |
| Trace | 1 (4.5) | ||||
| 1+ | |||||
| 2+ | |||||
| 3+ | |||||
| 4+ | |||||
| 2nd (BGS-21-05) | No. of participants | 20 | 20 | Le(a–b+) | 20 (100) |
| Negative | 20 (100.0) | ||||
| Trace | |||||
| 1+ | 1 (5.0) | ||||
| 2+ | 8 (40.0) | ||||
| 3+ | 9 (45.0) | ||||
| 4+ | 2 (10.0) | ||||