Absolute CD4 T cells (cells/
μl)
   
Apogee Auto40

Mean ± SD

627 ± 591

1432 ± 821

FACSCalibur

Mean ± SD

635 ± 588

1449 ± 835

Absolute bias (limits of agreement)^{a}

Mean (±1.96 SD)

−16.0 (−38.2;6.1)

30.0 (−14.7;88.7)

Relative (%) bias (limits of agreement)^{b}

Mean (±1.96 SD)

1.0 (−1.8;3.8)

0.3 (−2.2;2.7)

Percentage of CD4 T cells (%CD4)
   
Apogee Auto40

Mean ± SD

29.1 ± 12.8

32.1 ± 10.1

FACSCalibur

Mean ± SD

28.5 ± 12.5

32.3 ± 10.6

Absolute bias (limits of agreement)^{a}

Mean (±1.96 SD)

−3.0 (−7.1;1.1)

1.0 (−0.4;2.4)

Relative (%) bias (limits of agreement)^{b}

Mean (±1.96 SD)

−11.0 (−25.8;3.8)

3.0 (−1.3;5.3)
