Table 1.

Characteristics at ART initiation of 1394 children included in the analysis of six-month weight, height, CD4 cell gain^*

Characteristic at ART initiation	Frequency**	Percentage
Sex
Male	699	50.18
Female	694	49.82
WHO Clinical stage
1 or 2	422	32.61
3 or 4	872	67.39
Severity of immunosuppression (WHO)
Mild or not significant	158	11.55
Advanced	90	6.58
Severe	1120	81.87
Viral load
>=100 000 copies/ml	772	58.31
<100000 copies/ml	552	41.69
Weight-for-age z score†
>=−2SD	668	49.34
−2 to −3SD	308	22.75
< −3SD	378	27.92
Height-for-age z score†
>=−2SD	430	32.02
−2 to −3SD	401	29.86
< −3SD	512	38.12
TB treatment at ART initiation
No	1041	74.68
Yes	353	25.32
Age at ART initiation
< 1.5 years	262	18.79
1.5 – 2.9 years	239	17.14
3.0 – 4.9 years	254	18.22
5.0 – 7.9 years	349	25.04
8.0 – 15.0 years	290	20.8
Time on ART in months median (IQR)	25.2	(17.9 to 33.5)‡

^*Children were included if they had at least 6 months of follow-up on ART and at least a pre-HAART and a 6-month measurement needed to estimate the six-month gain. Those children were part of a cohort of HIV-infected children who were initiated on ART at HSCC between April, 2004 and March, 2008. IQR = interquartile range.

^†Gender specific weight- and height- for-age z score were obtained by plotting the weight measurements at baseline against the World Health Organization (WHO) weight- and height-for-age charts for children <= 5years and against the Center for Disease and Control prevention (CDC) for children older than 5 years.

^‡Minimum = 6 months, Maximum = 47 months.

^**Totals varies by baseline characteristics due to missing data