TABLE 3.

Differences between estimated mean viral loads from NucliSens, RealTime, Xpert, and Aptima assays according to HIV-1 subtype

HIV-1 subtype and assays compared	Difference between estimated mean viral loads (log copies/ml)	Standard error of difference (log copies/ml)	Pa
Subtype A1
NucliSens vs RealTime	−0.24	0.09	0.33
NucliSens vs Xpert	−0.64	0.09	<0.01
NucliSens vs Aptima	−0.68	0.09	<0.01
RealTime vs Xpert	−0.40	0.11	0.02
RealTime vs Aptima	−0.44	0.10	<0.01
Xpert vs Aptima	−0.04	0.11	1.00
Subtype B
NucliSens vs RealTime	0.18	0.06	0.13
NucliSens vs Xpert	0.06	0.06	1.00
NucliSens vs Aptima	0.05	0.06	1.00
RealTime vs Xpert	0.12	0.07	0.93
RealTime vs Aptima	−0.13	0.06	0.82
Xpert vs Aptima	−0.01	0.06	1.00
Subtype C
NucliSens vs RealTime	0.26	0.10	0.37
NucliSens vs Xpert	−0.21	0.09	0.56
NucliSens vs Aptima	−0.19	0.09	0.37
RealTime vs Xpert	−0.46	0.11	0.01
RealTime vs Aptima	−0.46	0.11	0.02
Xpert vs Aptima	0.01	0.09	1.00
Subtype CRF02_AG/G
NucliSens vs RealTime	−0.44	0.19	0.63
NucliSens vs Xpert	−0.41	0.17	0.58
NucliSens vs Aptima	−0.58	0.18	0.09
RealTime vs Xpert	0.03	0.22	1.00
RealTime vs Aptima	−0.14	0.23	1.00
Xpert vs Aptima	−0.17	0.19	1.00

^aAdjusted for multiple comparisons by the Tukey-Kramer method.