Fig. 2

Relation between chronological age and cognitive developmental age-equivalents (DAE) for children (n = 32) with small deletions (group 1, n = 4), larger deletions (group 2, n = 23) and deletions including PARVB and SULT4A1 genes (group 3, n = 5). There is a significant difference between groups 1 and 2 (p < 0.001) and between groups 2 and 3 (p = 0.044)