Table. 8.

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)
Lab Med Qual Assur 2022;44:10~20 https://doi.org/10.15263/jlmqa.2022.44.1.10
© Lab Med Qual Assur