An overview of the results from the three analytical methods. The numbers of genes that were identified by differential expression analysis, hypervariable (HV) gene analysis, and discriminant function analysis (DFA) are represented in a Venn diagram. The numbers of genes identified uniquely in a given analysis as relevant to patients with juvenile rheumatoid arthritis (JRA) are shown in nonoverlapping regions. The numbers of genes identified in more than one analysis are shown in overlapping regions. HC, genes expressed at higher levels in healthy controls; JRA, genes expressed at higher levels in patients.