Disease genes within a classification are more strongly correlated with each other than with genes not linked to the disease.

No. of genes: total number of genes in U133_2.0 arrays identified that are associated with a disorder name (44); No. of probesets: total number of probesets mapping to the genes; Mean Intra-disorder Correlation: mean Pearson correlation coefficient for all disease genes; Mean Extra-disorder Correlation: mean correlation between disease genes and all other genes in U133_2.0 arrays; Significance of Enrichment: t-test p-value comparing intra-disorder correlation with extra-disorder correlation.