Laboratory Medicine and Quality Assurance

Table. 10. Table 10

Number of participating laboratories according to the technique for ABO antibody titration

Trial	Technique	No.	Acceptable range (%)	Titer

				4	8	16	32	64	128	256	512	1024
Anti-A
1st (BBS-20-03)	Tube-IS	38	97.4			2	20	15	1
	Tube-RT	22	100.0				6	14	2
	Tube-AHG	21	100.0					4	13	4
	Tube-AHG+DTT	5	NA					1		3	1
	CAT-RT	15	100.0					15
	CAT-AHG	33	100.0					1	16	16
	CAT-AHG+DTT	5	NA						2	3
	Others	1	NA				1
	Total	140	NA			2	27	50	34	26	1
2nd (BBS-20-06)	Tube-IS	35	94.3			2	18	13	2
	Tube-RT	25	100.0				6	17	2
	Tube-AHG	21	100.0					5	16
	Tube-AHG+DTT	6	NA				2	2	1
	CAT-RT	15	100.0				7	8
	CAT-AHG	35	100.0					5	24	6
	CAT-AHG+DTT	5	NA					1	2	2
	Others	1	NA				1
	Total	142	NA			2	34	51	47	8
Anti-B
1st (BBS-20-03)	Tube-IS	38	97.4		6	22	9	1
	Tube-RT	22	95.5		1	10	11
	Tube-AHG	21	95.2			1	7	12	1
	Tube-AHG+DTT	5	NA				1	1	2	1
	CAT-RT	15	100.0			13	2
	CAT-AHG	33	100.0				10	17	6
	CAT-AHG+DTT	5	NA					4	1
	Others	1	NA				1
	Total	140	NA		7	47	40	35	10	1
2nd (BBS-20-06)	Tube-IS	35	97.1			12	17	5	1
	Tube-RT	25	100.0			1	12	12
	Tube-AHG	21	100.0					1	13	7
	Tube-AHG+DTT	5	NA				2	2		1
	CAT-RT	15	100.0			1	9	5
	CAT-AHG	35	97.1					1	11	18	5
	CAT-AHG+DTT	5	NA					1	1	2	1
	Others	1	NA			1
	Total	142	NA			15	40	27	26	28	6

Acceptable results are indicated in bold.

Abbreviations: IS, immediate spin; RT, room temperature incubation; AHG, indirect anti-human globulin test; DTT, dithiothreitol; CAT, column agglutination technology; NA, not applicable.

Lab Med Qual Assur 2021;43:167~175 https://doi.org/10.15263/jlmqa.2021.43.4.167