Table. 4.

Number (%) of participants in the proficiency tests for ABO subgroup typing

Trial (specimen) Category Anti-sera ABO subgroup

Anti-A Anti-B Anti-A1 Anti-H
1st (BGS-21-01) No. of participants 64 64 64 64 A1Bw 64 (100.0)
Negative 3 (4.8)
± 1 (1.6) 13 (20.6)
1+ 28 (43.8) 36 (57.1)
2+ 12 (18.8) 10 (15.9)
3+ 2 (3.1) 15 (23.4) 1 (1.6)
4+ 62 (96.9) 49 (76.6)
MF 23 (35.9)
2nd (BGS-21-04) No. of participants 64 64 64 64 A1B 21 (32.8)
Negative 5 (7.9) A1Bw 43 (67.2)
± 8 (12.7)
1+ 40 (63.5)
2+ 8 (12.5) 7 (11.1)
3+ 1 (1.6) 17 (26.6) 3 (4.7) 2 (3.2)
4+ 63 (98.4) 17 (26.6) 61 (95.3)
MF 22 (34.4) 1 (1.6)

Abbreviation: MF, mixed field agglutination.

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