Table 2.

p-Values and limit of agreement for absolute CD4 cell counts determined using Helios.

CD4+ T-Cell Group	Bland–Altman Difference between PIMA and Helios (Limits of Agreement)		T-Test (p-Value)
<200	−48.15 (−114.76–18.46)	n = 7	0.01
200–350	−1.76 (−105.94–102.43)	n = 2	0.97
350–500	−80.28 (−325.55–162.99)	n = 4	0.34
>500	−109.03 (−485.57–267.51)	n = 27	0.00
Total	−90.14 (−416–236.34)	n = 40	0.00