Table 2.

Characteristics at the latest of 1 January 1997 or the start of treatment with antiretrovirals of children aged 2-12 years in the collaborative HIV paediatric study (CHIPS) who took antiretrovirals after 1 January 1997

Characteristic	No of children	Median (interquartile range)
Age (years)	615	4.8 (2.2-8.1)
Centers for Disease Control stage*:	615
NA		231 (38%)
B		184; 30%
C		200; 33%
CD4 cell percentage	584	14 (8-22)
HIV-1 RNA (log10 (copies/ml))	516	5.1 (4.5-5.7)

^*Two of three most severe categories only are presented.