Table 3.

Agreement (κ coefficient) using CD4 count obtained by flow cytometry, CD4 percent by computational estimate, and total lymphocyte count (TLC) compared to CD4 percent obtained by flow cytometry for children not eligible for ART on clinical grounds, i.e. WHO stage I or II

Age group	n	CD4 count	CD4 percent computational estimate	TLC
Overall	170/125*	77.6% (0.39)	87.6% (0.71)	64.8% (0.04)*
≤ 11 months	41	78.0% (0.19)	87.8% (0.63)	80.5% (0.32)
12 to 35 months	22	68.2% (0.32)	95.4% (0.91)	54.5% (0.02)
36 to 59 months	21	71.4% (0.25)	71.4% (0.35)	47.6% (-0.32)
60 months to 96 months	41	85.4% (0.58)	92.7% (0.82)	63.4% (0.04)
≥ 96 months	45	77.8% (0.45)	86.7% (0.71)	N/A†

* 125 children aged between 0 and 8 years; † Total lymphocyte count (TLC) is not valid in children older than 8 years (n = 45)