Comparison between the PIMA POC CD4 analyzer using capillary blood or venous blood samples and FACSCalibur.

<p>Passing-Bablok regression plots: comparison of absolute CD4 counts obtained by the PIMA POC CD4 analyzer using capillary blood samples (A) and venous blood samples (B) versus FACSCalibur using venous blood samples. The solid blue line represents the regression line and the dashed lines represent the 95% CI for the regression line. The corresponding graphs the relative bias between the PIMA POC CD4 analyzer and the FACSCalibur are represented in Pollock plots for capillary blood samples (C) and venous blood samples (D). The solid blue line represent the mean bias. The dashed lines represent the upper and lower limits of agreement (LOA = mean bias ± 1.96 <i>SD)</i>.