Characteristics of children at ART start by program year.

<p>Characteristics of children at ART start by program year summarized as medians for continuous variables and proportions for categorical variables. p<0.001 for changes over program year for all variables (Cuzick's test for trend for continuous variables and logistic regression for categorical variables). (Note: Only children <10 years of age included in weight-for-age z-score graphs and only South African sites included for graphs of HIV-RNA.)