Bland-Altman and Passing and Bablok regression scatter plots.

<p>Xpert HIV-1 VL versus (A) Taqman v2 (n = 53) and (B) Abbott HIV-1 RT (n = 45); (1) Bland Altman difference plots show the mean bias (solid line) and confidence intervals (dashed line); (2) Passing and Bablok regression analysis show the regression line (solid) with confidence intervals (dashed). Legends highlight the bias and regression equation.