Figure 1: Bland-Altman plot for absolute CD4 cell count between the PointCare NOW and the FACSCalibur Single Platform. The Mean difference in absolute CD4 count (FacsCalibur – PointCare NOW) (Mean = 8.67 cells/µl), the lower limit of agreement (Mean-1.96SD = -202.61 cells/µl), and the upper limit of agreement (Mean + 1.96 SD = 219.96 cells/μl) are displayed as horizontal lines.
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