Table 5.

Individual laboratory relative potency estimates (geometric mean) for cell-binding assays.

	Versus IH Refa						Versus candidate (Sample A)
	Candidate (Sample A)			Sample C			Coded duplicate (Sample B)			Sample C
Lab	GM	%GCV	n	GM	%GCV	n	GM	%GCV	n	GM	%GCV	n
6	1.09	7	7	1.04	8	6	0.99	7	9	0.93	11	8
8	0.91	17	3	0.92	11	3	1.02	19	3	1.01	11	3
10	0.57	12	5	0.57	9	6	0.96	16	5	1.01	5	4
12	Not available						0.99	10	3	1.02	n/a	1
16	0.97	9	3	0.86	8	3	0.95	4	3	0.88	1	3

^a“In house” reference standard.