TABLE 2.

Proportion of replicate assays that were reactive on 29 Ultrio initially nonreactive HBsAg carrier samples and individual results on four samples with significantly different reactivity rates between the Ultrio Plus and TaqScreen assays

Sample	copies/mL	Ultrio†	Ultrio Plus†	TaqScreen†	p value*
1	1.6	0/12 (0)	1/12 (8)	4/6 (67)	0.009
2	4.6	3/12 (25)	10/12 (83)	2/6 (33)	0.034
3	1.2	0/12 (0)	1/12 (8)	3/6 (50)	0.045
4	1.0	2/12 (17)	6/12 (50)	0/6 (0)	0.003
5–29	0.3–240	Not shown	Not shown	Not shown	NS
All (n = 29)	0.3–240	80/348 (23)‡	225/348 (65)‡	125/174 (72)	0.0997

^*p value for comparison Ultrio Plus versus TaqScreen.

^†Data are reported as number (%).

^‡p < 0.0001.

NS = not significant.

[Correction added after online publication 29-Apr-2013: Footnotes have been updated.]