There were 18 subjects with ADHD misclassified as AE. In comparison to the ADHD subjects that were correctly classified (n = 56), these subjects differed significantly on FSIQ (lower). They were marginally different on handedness (more left-or mixed-handed; Fisher’s exact p = .055). They did not differ on age, sex, ethnicity, race, any measure of growth deficiency, microcephaly, or any measure of structural abnormality. On the neuropsychological measures, they differed significantly (misclassified < correctly classified) on all measures except CANTAB Simple Reaction Time (p = .934) and D-KEFS Verbal Fluency Switching (p = .134).
