TABLE 1.

Concordance, Pearson correlation coefficients, and numbers of samples with viral load differences of >0.5 log copies/ml between assays

Assays compared and test 1 viral loads	No. of samples with test 2 viral loads of:		Total no.	Concordant samples (%)	No. of quantified samples	Pearson r	% (no.) of samples with differences of:
	≤1.59 log copies/ml	>1.60 log copies/ml					>0.5 log copies/ml	<0.5 log copies/ml
NucliSens vs RealTime				89.74	162	0.91	10.49 (17)	20.99 (34)
≤1.59 log copies/ml	83	16	99
>1.60 log copies/ml	12	162	174
NucliSens vs Xpert				84.96	146	0.90	4.79 (7)	26.71 (39)
≤1.59 log copies/ml	80	18	98
>1.60 log copies/ml	22	146	168
NucliSens vs Aptima				83.89	163	0.89	5.52 (9)	38.65 (63)
≤1.59 log copies/ml	87	34	121
>1.60 log copies/ml	14	163	177
RealTime vs Xpert				89.80	82	0.98	0 (0)	10.98 (9)
≤1.59 log copies/ml	50	3	53
>1.60 log copies/ml	12	82	94
RealTime vs Aptima				89.78	82	0.98	3.66 (3)	20.73 (17)
≤1.59 log copies/ml	41	11	52
>1.60 log copies/ml	3	82	85
Xpert vs Aptima				91.37	116	0.97	3.45 (4)	6.90 (8)
≤1.59 log copies/ml	64	4	68
>1.60 log copies/ml	13	116	129