average number of genes per CNV for each disorder was as follows: ID—49 genes; ASD—28 genes; schizophrenia—32 genes; and epilepsy—47 genes. Notably, ID CNVs were significantly larger than ASD CNVs (p=.009) (Figure 2). Also CNVs were categorized as either deletion or duplication. As shown in Figure 2A, ID demonstrated a majority of deletions, 67% as compared 33% duplications, yet by contrast schizophrenia exhibited 57% deletions and 43% duplications. However, there were no statistically significant differences between deletions and duplications across DSM disorders.