Table 3.

Overall concordance in the classification at the 2000 IU/ml and 20,000 IU/ml medical decision points between HPS/CTM HBV v2 and cobas 6800/8800 HBV assays^*.

Concordance between HPS and c6800		c6800/8800 HBV		Total	OPA (95% CI)
		<2000 IU/ml	⩾2000 IU/ml
2000 IU/ml cutoff
HPS/CTM HBV v2	<2000 IU/ml	134	8	142	95.3% (92.3–97.4%)
	⩾2000 IU/ml	6	152	158
	Total	140	160	300
Concordance between HPS and c6800/8800		c6800/8800 HBV		Total	OPA (95% CI)
		<20,000 IU/ml	⩾20,000 IU/ml
20,000 IU/ml cutoff
HPS/CTM HBV v2	<20,000 IU/ml	202	3	205	97% (94.4–98.6%)
	⩾20,000 IU/ml	6	89	95
	Total	208	92	300

^*cobas 6800/8800 HBV, cobas HBV test for use on the cobas 6800/8800 Systems; HPS/CTM HBV v2, COBAS TaqMan HBV test for use with the High Pure System.

CI, confidence interval; HBV, hepatitis B virus; OPA, overall percent agreement.