Fig. 2

Comparison between FACSPresto and FACSCount. Passing-Bablok regression plot comparison of a absolute CD4 count and c CD4% values obtained from FACSPresto with the FACSCount as reference standard. The solid line represents the regression line and dashed line the 95% CI. Pollockplots indicating %mean bias between b absolute CD4 count and d CD4% values obtained on FACSPresto compared with those obtained on theFACSCount. The solid line represents the mean bias, the dashed line represents mean bias ± 1.96SD