Figure 2

Bland Altman plot analysis of the CD4+ T cell counts obtained by Easy CD4 assay (Guava) and flow cytometry. Bland-Altman plot comparing absolute CD4 cell counts estimated by Guava EasyCD4 assay and conventional flowcytometry. The dark continuous line drawn indicates the bias (mean difference), and the dotted lines are the limits of agreement (mean ± 2 SD).