. 2009 Oct 28;16(12):1781–1788. doi: 10.1128/CVI.00248-09

TABLE 5.

IgG anti-PT ELISA accuracy results using WHO pertussis antiserum (human) reference reagent

Anti-PT IgG concn (IU/ml) for NIBSC 06/140 (reference)^a	Anti-PT IgG concn (EU/ml)					% Accuracy^b
Anti-PT IgG concn (IU/ml) for NIBSC 06/140 (reference)^a	Replicate 1	Replicate 2	Replicate 3	Geometric mean	Expected value^b	% Accuracy^b
50	56	54	57	56	50	112
100	109	101	104	105	100	105
150	152	147	151	150	150	100
200	197	247	196	212	200	106

WHO Pertussis antiserum (human) reference reagent, NIBSC 06/140.

Expected value and accuracy calculations were based on the assumption that 1 IU = 1 EU (39).